캐릭터 상세 조회 - 원작 번역 및 캐릭터 소개 일괄 번역 기능 구현

- `SeriesTranslationPayload.keywords` 타입을 `String`에서 `List<String>`으로 변경했습니다.
- `SeriesTranslationPayloadConverter`의 `convertToEntityAttribute`를 하위 호환 가능하도록 수정했습니다.
  - DB에 저장된 JSON에서 `keywords`가 과거 스키마(String)인 경우와 신규 스키마(List)를 모두 안전하게 파싱합니다.
  - 파싱 실패 또는 공백 입력 시 기본값을 사용합니다(`keywords = []`).
- `convertToDatabaseColumn`은 변경 없이 `ObjectMapper`로 직렬화하여 `keywords`가 배열로 저장됩니다.

src/main/kotlin/kr/co/vividnext/sodalive/admin/chat/character/AdminChatCharacterController.kt

@@ -13,8 +13,13 @@ import kr.co.vividnext.sodalive.chat.character.CharacterType
 import kr.co.vividnext.sodalive.chat.character.service.ChatCharacterService
 import kr.co.vividnext.sodalive.common.ApiResponse
 import kr.co.vividnext.sodalive.common.SodaException
+import kr.co.vividnext.sodalive.content.LanguageDetectEvent
+import kr.co.vividnext.sodalive.content.LanguageDetectTargetType
+import kr.co.vividnext.sodalive.i18n.translation.LanguageTranslationEvent
+import kr.co.vividnext.sodalive.i18n.translation.LanguageTranslationTargetType
 import kr.co.vividnext.sodalive.utils.generateFileName
 import org.springframework.beans.factory.annotation.Value
+import org.springframework.context.ApplicationEventPublisher
 import org.springframework.http.HttpEntity
 import org.springframework.http.HttpHeaders
 import org.springframework.http.HttpMethod
@@ -40,6 +45,7 @@ class AdminChatCharacterController(
     private val adminService: AdminChatCharacterService,
     private val s3Uploader: S3Uploader,
     private val originalWorkService: AdminOriginalWorkService,
+    private val applicationEventPublisher: ApplicationEventPublisher,
 
     @Value("\${weraser.api-key}")
     private val apiKey: String,
@@ -165,6 +171,18 @@ class AdminChatCharacterController(
             originalWorkService.assignOneCharacter(request.originalWorkId, chatCharacter.id!!)
         }
 
+        // 5. 언어 코드가 지정되지 않은 경우, 파파고 언어 감지 API를 통해 비동기로 언어를 식별한다.
+        //    언어 감지에 사용할 내용은 chatCharacter.description 만 사용한다.
+        if (chatCharacter.languageCode.isNullOrBlank() && chatCharacter.description.isNotBlank()) {
+            applicationEventPublisher.publishEvent(
+                LanguageDetectEvent(
+                    id = chatCharacter.id!!,
+                    query = chatCharacter.description,
+                    targetType = LanguageDetectTargetType.CHARACTER
+                )
+            )
+        }
+
         ApiResponse.ok(null)
     }
 
@@ -315,6 +333,13 @@ class AdminChatCharacterController(
             request = request
         )
 
+        applicationEventPublisher.publishEvent(
+            LanguageTranslationEvent(
+                id = request.id,
+                targetType = LanguageTranslationTargetType.CHARACTER
+            )
+        )
+
         // 원작 연결: originalWorkId가 있으면 서비스 계층을 통해 배정
         if (request.originalWorkId != null) {
             // 서비스에서 유효성 검증 및 저장까지 처리

src/main/kotlin/kr/co/vividnext/sodalive/admin/chat/original/service/AdminOriginalWorkService.kt

@@ -10,6 +10,11 @@ import kr.co.vividnext.sodalive.chat.original.OriginalWorkTag
 import kr.co.vividnext.sodalive.chat.original.OriginalWorkTagMapping
 import kr.co.vividnext.sodalive.chat.original.repository.OriginalWorkTagRepository
 import kr.co.vividnext.sodalive.common.SodaException
+import kr.co.vividnext.sodalive.content.LanguageDetectEvent
+import kr.co.vividnext.sodalive.content.LanguageDetectTargetType
+import kr.co.vividnext.sodalive.i18n.translation.LanguageTranslationEvent
+import kr.co.vividnext.sodalive.i18n.translation.LanguageTranslationTargetType
+import org.springframework.context.ApplicationEventPublisher
 import org.springframework.data.domain.Page
 import org.springframework.data.domain.PageRequest
 import org.springframework.data.domain.Sort
@@ -24,7 +29,9 @@ import org.springframework.transaction.annotation.Transactional
 class AdminOriginalWorkService(
     private val originalWorkRepository: OriginalWorkRepository,
     private val chatCharacterRepository: ChatCharacterRepository,
-    private val originalWorkTagRepository: OriginalWorkTagRepository
+    private val originalWorkTagRepository: OriginalWorkTagRepository,
+
+    private val applicationEventPublisher: ApplicationEventPublisher
 ) {
 
     /** 원작 등록 (중복 제목 방지 포함) */
@@ -56,7 +63,44 @@ class AdminOriginalWorkService(
                 entity.tagMappings.add(OriginalWorkTagMapping(originalWork = entity, tag = tagEntity))
             }
         }
-        return originalWorkRepository.save(entity)
+
+        val originalWork = originalWorkRepository.save(entity)
+
+        /**
+         * 저장이 완료된 후
+         * originalWork의
+         *
+         * languageCode == null이면 언어 감지 이벤트 호출
+         * languageCode != null이면 번역 이벤트 호출
+         *
+         */
+        if (originalWork.languageCode == null) {
+            val papagoQuery = listOf(
+                originalWork.title,
+                originalWork.contentType,
+                originalWork.category,
+                originalWork.description
+            )
+                .filter { it.isNotBlank() }
+                .joinToString(" ")
+
+            applicationEventPublisher.publishEvent(
+                LanguageDetectEvent(
+                    id = originalWork.id!!,
+                    query = papagoQuery,
+                    targetType = LanguageDetectTargetType.ORIGINAL_WORK
+                )
+            )
+        } else {
+            applicationEventPublisher.publishEvent(
+                LanguageTranslationEvent(
+                    id = originalWork.id!!,
+                    targetType = LanguageTranslationTargetType.ORIGINAL_WORK
+                )
+            )
+        }
+
+        return originalWork
     }
 
     /** 원작 수정 (이미지 경로 포함 선택적 변경) */
@@ -107,6 +151,25 @@ class AdminOriginalWorkService(
         if (imagePath != null) {
             ow.imagePath = imagePath
         }
+
+        /**
+         * 번역 이벤트 호출
+         */
+        if (
+            request.title != null ||
+            request.contentType != null ||
+            request.category != null ||
+            request.description != null ||
+            request.tags != null
+        ) {
+            applicationEventPublisher.publishEvent(
+                LanguageTranslationEvent(
+                    id = ow.id!!,
+                    targetType = LanguageTranslationTargetType.ORIGINAL_WORK
+                )
+            )
+        }
+
         return originalWorkRepository.save(ow)
     }
 

src/main/kotlin/kr/co/vividnext/sodalive/admin/content/theme/AdminContentThemeService.kt

@@ -5,8 +5,11 @@ import kr.co.vividnext.sodalive.aws.s3.S3Uploader
 import kr.co.vividnext.sodalive.common.SodaException
 import kr.co.vividnext.sodalive.content.theme.AudioContentTheme
 import kr.co.vividnext.sodalive.content.theme.GetAudioContentThemeResponse
+import kr.co.vividnext.sodalive.i18n.translation.LanguageTranslationEvent
+import kr.co.vividnext.sodalive.i18n.translation.LanguageTranslationTargetType
 import kr.co.vividnext.sodalive.utils.generateFileName
 import org.springframework.beans.factory.annotation.Value
+import org.springframework.context.ApplicationEventPublisher
 import org.springframework.data.repository.findByIdOrNull
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
@@ -18,6 +21,8 @@ class AdminContentThemeService(
     private val objectMapper: ObjectMapper,
     private val repository: AdminContentThemeRepository,
 
+    private val applicationEventPublisher: ApplicationEventPublisher,
+
     @Value("\${cloud.aws.s3.bucket}")
     private val bucket: String
 ) {
@@ -37,7 +42,14 @@ class AdminContentThemeService(
     }
 
     fun createTheme(theme: String, imagePath: String) {
-        repository.save(AudioContentTheme(theme = theme, image = imagePath))
+        val savedTheme = repository.save(AudioContentTheme(theme = theme, image = imagePath))
+
+        applicationEventPublisher.publishEvent(
+            LanguageTranslationEvent(
+                id = savedTheme.id!!,
+                targetType = LanguageTranslationTargetType.CONTENT_THEME
+            )
+        )
     }
 
     fun themeExistCheck(request: CreateContentThemeRequest) {

src/main/kotlin/kr/co/vividnext/sodalive/api/home/HomeService.kt

@@ -1,7 +1,9 @@
 package kr.co.vividnext.sodalive.api.home
 
 import kr.co.vividnext.sodalive.audition.AuditionService
+import kr.co.vividnext.sodalive.chat.character.dto.Character
 import kr.co.vividnext.sodalive.chat.character.service.ChatCharacterService
+import kr.co.vividnext.sodalive.chat.character.translate.AiCharacterTranslationRepository
 import kr.co.vividnext.sodalive.content.AudioContentMainItem
 import kr.co.vividnext.sodalive.content.AudioContentService
 import kr.co.vividnext.sodalive.content.ContentType
@@ -10,10 +12,13 @@ import kr.co.vividnext.sodalive.content.main.banner.AudioContentBannerService
 import kr.co.vividnext.sodalive.content.main.curation.AudioContentCurationService
 import kr.co.vividnext.sodalive.content.series.ContentSeriesService
 import kr.co.vividnext.sodalive.content.series.GetSeriesListResponse
+import kr.co.vividnext.sodalive.content.series.translation.SeriesTranslationRepository
 import kr.co.vividnext.sodalive.content.theme.AudioContentThemeService
+import kr.co.vividnext.sodalive.content.translation.ContentTranslationRepository
 import kr.co.vividnext.sodalive.creator.admin.content.series.SeriesPublishedDaysOfWeek
 import kr.co.vividnext.sodalive.event.GetEventResponse
 import kr.co.vividnext.sodalive.explorer.ExplorerQueryRepository
+import kr.co.vividnext.sodalive.i18n.LangContext
 import kr.co.vividnext.sodalive.live.room.LiveRoomService
 import kr.co.vividnext.sodalive.live.room.LiveRoomStatus
 import kr.co.vividnext.sodalive.member.Member
@@ -47,6 +52,12 @@ class HomeService(
     private val rankingRepository: RankingRepository,
     private val explorerQueryRepository: ExplorerQueryRepository,
 
+    private val contentTranslationRepository: ContentTranslationRepository,
+    private val aiCharacterTranslationRepository: AiCharacterTranslationRepository,
+    private val seriesTranslationRepository: SeriesTranslationRepository,
+
+    private val langContext: LangContext,
+
     @Value("\${cloud.aws.cloud-front.host}")
     private val imageHost: String
 ) {
@@ -111,6 +122,8 @@ class HomeService(
             }
         }
 
+        val translatedLatestContentList = getTranslatedContentList(contentList = latestContentList)
+
         val eventBannerList = GetEventResponse(
             totalCount = 0,
             eventList = emptyList()
@@ -122,23 +135,28 @@ class HomeService(
             isAdult = isAdult
         )
 
+        // 오직 보이스온에서만
         val originalAudioDramaList = seriesService.getOriginalAudioDramaList(
             isAdult = isAdult,
             contentType = contentType,
             orderByRandom = true
         )
 
+        val translatedOriginalAudioDramaList = getTranslatedSeriesList(seriesList = originalAudioDramaList)
+
         val auditionList = auditionService.getInProgressAuditionList(isAdult = isAdult)
 
+        // 요일별 시리즈
         val dayOfWeekSeriesList = seriesService.getDayOfWeekSeriesList(
             memberId = memberId,
             isAdult = isAdult,
             contentType = contentType,
             dayOfWeek = getDayOfWeekByTimezone(timezone)
         )
+        val translatedDayOfWeekSeriesList = getTranslatedSeriesList(seriesList = dayOfWeekSeriesList)
 
         // 인기 캐릭터 조회
-        val popularCharacters = characterService.getPopularCharacters()
+        val translatedPopularCharacters = getTranslatedAiCharacterList(aiCharacterList = characterService.getPopularCharacters())
 
         val currentDateTime = LocalDateTime.now()
         val startDate = currentDateTime
@@ -159,12 +177,64 @@ class HomeService(
             sort = ContentRankingSortType.REVENUE
         )
 
+        val contentRankingContentIds = contentRanking.map { it.contentId }
+        val translatedContentRanking = if (contentRankingContentIds.isNotEmpty()) {
+            val translations = contentTranslationRepository
+                .findByContentIdInAndLocale(contentIds = contentRankingContentIds, locale = langContext.lang.code)
+                .associateBy { it.contentId }
+
+            contentRanking.map { item ->
+                val translatedTitle = translations[item.contentId]?.renderedPayload?.title
+                if (translatedTitle.isNullOrBlank()) {
+                    item
+                } else {
+                    item.copy(title = translatedTitle)
+                }
+            }
+        } else {
+            contentRanking
+        }
+
         val recommendChannelList = recommendChannelService.getRecommendChannel(
             memberId = memberId,
             isAdult = isAdult,
             contentType = contentType
         )
 
+        /**
+         * recommendChannelList의 콘텐츠 번역 데이터 조회
+         *
+         * languageCode != null
+         * contentTranslationRepository를 이용해 번역 콘텐츠를 조회한다. - contentId, locale
+         *
+         * 한 번에 조회하고 contentId를 매핑하여 recommendChannelList의 콘텐츠 title을 번역 데이터로 변경한다
+         */
+        val channelContentIds = recommendChannelList
+            .flatMap { it.contentList }
+            .map { it.contentId }
+            .distinct()
+
+        val translatedRecommendChannelList = if (channelContentIds.isNotEmpty()) {
+            val translations = contentTranslationRepository
+                .findByContentIdInAndLocale(contentIds = channelContentIds, locale = langContext.lang.code)
+                .associateBy { it.contentId }
+
+            recommendChannelList.map { channel ->
+                val translatedContentList = channel.contentList.map { item ->
+                    val translatedTitle = translations[item.contentId]?.renderedPayload?.title
+                    if (translatedTitle.isNullOrBlank()) {
+                        item
+                    } else {
+                        item.copy(title = translatedTitle)
+                    }
+                }
+
+                channel.copy(contentList = translatedContentList)
+            }
+        } else {
+            recommendChannelList
+        }
+
         val freeContentList = contentService.getLatestContentByTheme(
             theme = contentThemeService.getActiveThemeOfContent(
                 isAdult = isAdult,
@@ -183,6 +253,8 @@ class HomeService(
             }
         }
 
+        val translatedFreeContentList = getTranslatedContentList(contentList = freeContentList)
+
         // 포인트 사용가능 콘텐츠 리스트 - 랜덤으로 가져오기 (DB에서 isPointAvailable 조건 적용)
         val pointAvailableContentList = contentService.getLatestContentByTheme(
             theme = emptyList(),
@@ -199,6 +271,8 @@ class HomeService(
             }
         }
 
+        val translatedPointAvailableContentList = getTranslatedContentList(contentList = pointAvailableContentList)
+
         val curationList = curationService.getContentCurationList(
             tabId = 3L, // 기존에 사용하던 단편 탭의 큐레이션을 사용
             isAdult = isAdult,
@@ -210,17 +284,17 @@ class HomeService(
             liveList = liveList,
             creatorRanking = creatorRanking,
             latestContentThemeList = latestContentThemeList,
-            latestContentList = latestContentList,
+            latestContentList = translatedLatestContentList,
             bannerList = bannerList,
             eventBannerList = eventBannerList,
-            originalAudioDramaList = originalAudioDramaList,
+            originalAudioDramaList = translatedOriginalAudioDramaList,
             auditionList = auditionList,
-            dayOfWeekSeriesList = dayOfWeekSeriesList,
+            dayOfWeekSeriesList = translatedDayOfWeekSeriesList,
-            popularCharacters = popularCharacters,
+            popularCharacters = translatedPopularCharacters,
-            contentRanking = contentRanking,
+            contentRanking = translatedContentRanking,
-            recommendChannelList = recommendChannelList,
+            recommendChannelList = translatedRecommendChannelList,
-            freeContentList = freeContentList,
+            freeContentList = translatedFreeContentList,
-            pointAvailableContentList = pointAvailableContentList,
+            pointAvailableContentList = translatedPointAvailableContentList,
             recommendContentList = getRecommendContentList(
                 isAdultContentVisible = isAdultContentVisible,
                 contentType = contentType,
@@ -249,7 +323,7 @@ class HomeService(
             listOf(theme)
         }
 
-        return contentService.getLatestContentByTheme(
+        val contentList = contentService.getLatestContentByTheme(
             theme = themeList,
             contentType = contentType,
             isFree = false,
@@ -261,6 +335,8 @@ class HomeService(
                 true
             }
         }
+
+        return getTranslatedContentList(contentList = contentList)
     }
 
     fun getDayOfWeekSeriesList(
@@ -272,12 +348,14 @@ class HomeService(
         val memberId = member?.id
         val isAdult = member?.auth != null && isAdultContentVisible
 
-        return seriesService.getDayOfWeekSeriesList(
+        val dayOfWeekSeriesList = seriesService.getDayOfWeekSeriesList(
             memberId = memberId,
             isAdult = isAdult,
             contentType = contentType,
             dayOfWeek = dayOfWeek
         )
+
+        return getTranslatedSeriesList(seriesList = dayOfWeekSeriesList)
     }
 
     fun getContentRankingBySort(
@@ -371,6 +449,114 @@ class HomeService(
             }
         }
 
-        return result
+        return getTranslatedContentList(contentList = result)
+    }
+
+    /**
+     * 콘텐츠 리스트의 제목을 현재 언어(locale)에 맞춰 일괄 번역한다.
+     *
+     * 처리 절차:
+     * - 입력된 콘텐츠들의 contentId 집합을 만들고, 요청 언어 코드(langContext.lang.code)로
+     *   contentTranslationRepository에서 번역 데이터를 한 번에 조회한다.
+     * - 각 항목에 대해 번역된 제목이 존재하고 비어있지 않으면 title만 번역 값으로 교체한다.
+     * - 번역이 없거나 공백이면 원본 항목을 그대로 반환한다.
+     *
+     * 성능:
+     * - N건의 항목을 1회의 조회로 해결하기 위해 IN 쿼리를 사용한다.
+     *
+     * @param contentList 번역 대상 AudioContentMainItem 목록
+     * @return 제목이 가능한 항목은 번역된 목록(불변 사본), 그 외는 원본 항목 유지
+     */
+    private fun getTranslatedContentList(contentList: List<AudioContentMainItem>): List<AudioContentMainItem> {
+        val contentIds = contentList.map { it.contentId }
+
+        return if (contentIds.isNotEmpty()) {
+            val translations = contentTranslationRepository
+                .findByContentIdInAndLocale(contentIds = contentIds, locale = langContext.lang.code)
+                .associateBy { it.contentId }
+
+            contentList.map { item ->
+                val translatedTitle = translations[item.contentId]?.renderedPayload?.title
+                if (translatedTitle.isNullOrBlank()) {
+                    item
+                } else {
+                    item.copy(title = translatedTitle)
+                }
+            }
+        } else {
+            contentList
+        }
+    }
+
+    /**
+     * 시리즈 리스트의 제목을 현재 언어(locale)에 맞춰 일괄 번역한다.
+     *
+     * 처리 절차:
+     * - 입력된 시리즈들의 seriesId 집합을 만들고, 요청 언어 코드(langContext.lang.code)로
+     *   seriesTranslationRepository에서 번역 데이터를 한 번에 조회한다.
+     * - 각 항목에 대해 번역된 제목이 존재하고 비어있지 않으면 title만 번역 값으로 교체한다.
+     * - 번역이 없거나 공백이면 원본 항목을 그대로 반환한다.
+     *
+     * 성능:
+     * - N건의 항목을 1회의 조회로 해결하기 위해 IN 쿼리를 사용한다.
+     *
+     * @param seriesList 번역 대상 SeriesListItem 목록
+     * @return 제목이 가능한 항목은 번역된 목록(불변 사본), 그 외는 원본 항목 유지
+     */
+    private fun getTranslatedSeriesList(
+        seriesList: List<GetSeriesListResponse.SeriesListItem>
+    ): List<GetSeriesListResponse.SeriesListItem> {
+        val seriesIds = seriesList.map { it.seriesId }
+
+        return if (seriesIds.isNotEmpty()) {
+            val translations = seriesTranslationRepository
+                .findBySeriesIdInAndLocale(seriesIds = seriesIds, locale = langContext.lang.code)
+                .associateBy { it.seriesId }
+
+            seriesList.map { item ->
+                val translatedTitle = translations[item.seriesId]?.renderedPayload?.title
+                if (translatedTitle.isNullOrBlank()) {
+                    item
+                } else {
+                    item.copy(title = translatedTitle)
+                }
+            }
+        } else {
+            seriesList
+        }
+    }
+
+    /**
+     * AI 캐릭터 리스트의 이름/설명을 현재 언어(locale)에 맞춰 일괄 번역한다.
+     *
+     * 처리 절차:
+     * - characterId 목록을 추출하고, 요청 언어 코드로 aiCharacterTranslationRepository에서
+     *   번역 데이터를 한 번에 조회한다.
+     * - 각 캐릭터에 대해 name과 description 모두 번역 값이 존재하고 비어있지 않을 때에만
+     *   해당 필드를 교체한다. 둘 중 하나라도 없으면 원본 캐릭터를 그대로 유지한다.
+     *
+     * @param aiCharacterList 번역 대상 캐릭터 목록
+     * @return 가능한 경우 name/description이 번역된 캐릭터 목록, 그 외는 원본 유지
+     */
+    private fun getTranslatedAiCharacterList(aiCharacterList: List<Character>): List<Character> {
+        val characterIds = aiCharacterList.map { it.characterId }
+
+        return if (characterIds.isNotEmpty()) {
+            val translations = aiCharacterTranslationRepository
+                .findByCharacterIdInAndLocale(characterIds = characterIds, locale = langContext.lang.code)
+                .associateBy { it.characterId }
+
+            aiCharacterList.map { character ->
+                val translatedName = translations[character.characterId]?.renderedPayload?.name
+                val translatedDesc = translations[character.characterId]?.renderedPayload?.description
+                if (translatedName.isNullOrBlank() || translatedDesc.isNullOrBlank()) {
+                    character
+                } else {
+                    character.copy(name = translatedName, description = translatedDesc)
+                }
+            }
+        } else {
+            aiCharacterList
+        }
     }
 }

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/ChatCharacter.kt

@@ -22,6 +22,8 @@ class ChatCharacter(
     // 캐릭터 한 줄 소개
     var description: String,
 
+    var languageCode: String? = null,
+
     // AI 시스템 프롬프트
     @Column(columnDefinition = "TEXT", nullable = false)
     var systemPrompt: String,

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/comment/CharacterComment.kt

@@ -16,6 +16,7 @@ import javax.persistence.Table
 data class CharacterComment(
     @Column(columnDefinition = "TEXT", nullable = false)
     var comment: String,
+    var languageCode: String?,
     var isActive: Boolean = true
 ) : BaseEntity() {
     @ManyToOne(fetch = FetchType.LAZY)

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/comment/CharacterCommentController.kt

@@ -47,7 +47,7 @@ class CharacterCommentController(
         if (member.auth == null) throw SodaException("본인인증을 하셔야 합니다.")
         if (request.comment.isBlank()) throw SodaException("댓글 내용을 입력해주세요.")
 
-        val id = service.addReply(characterId, commentId, member, request.comment)
+        val id = service.addReply(characterId, commentId, member, request.comment, request.languageCode)
         ApiResponse.ok(id)
     }
 

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/comment/CharacterCommentDto.kt

@@ -2,7 +2,8 @@ package kr.co.vividnext.sodalive.chat.character.comment
 
 // Request DTOs
 data class CreateCharacterCommentRequest(
-    val comment: String
+    val comment: String,
+    val languageCode: String? = null
 )
 
 // Response DTOs
@@ -20,7 +21,8 @@ data class CharacterCommentResponse(
     val memberNickname: String,
     val createdAt: Long,
     val replyCount: Int,
-    val comment: String
+    val comment: String,
+    val languageCode: String?
 )
 
 // 답글 Response 단건(목록 원소)
@@ -35,7 +37,8 @@ data class CharacterReplyResponse(
     val memberProfileImage: String,
     val memberNickname: String,
     val createdAt: Long,
-    val comment: String
+    val comment: String,
+    val languageCode: String?
 )
 
 // 댓글의 답글 조회 Response 컨테이너

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/comment/CharacterCommentService.kt

@@ -2,7 +2,10 @@ package kr.co.vividnext.sodalive.chat.character.comment
 
 import kr.co.vividnext.sodalive.chat.character.repository.ChatCharacterRepository
 import kr.co.vividnext.sodalive.common.SodaException
+import kr.co.vividnext.sodalive.content.LanguageDetectEvent
+import kr.co.vividnext.sodalive.content.LanguageDetectTargetType
 import kr.co.vividnext.sodalive.member.Member
+import org.springframework.context.ApplicationEventPublisher
 import org.springframework.data.domain.PageRequest
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
@@ -12,7 +15,8 @@ import java.time.ZoneId
 class CharacterCommentService(
     private val chatCharacterRepository: ChatCharacterRepository,
     private val commentRepository: CharacterCommentRepository,
-    private val reportRepository: CharacterCommentReportRepository
+    private val reportRepository: CharacterCommentReportRepository,
+    private val applicationEventPublisher: ApplicationEventPublisher
 ) {
 
     private fun profileUrl(imageHost: String, profileImage: String?): String {
@@ -40,7 +44,8 @@ class CharacterCommentService(
             memberNickname = member.nickname,
             createdAt = toEpochMilli(entity.createdAt),
             replyCount = replyCountOverride ?: commentRepository.countByParent_IdAndIsActiveTrue(entity.id!!),
-            comment = entity.comment
+            comment = entity.comment,
+            languageCode = entity.languageCode
         )
     }
 
@@ -52,25 +57,44 @@ class CharacterCommentService(
             memberProfileImage = profileUrl(imageHost, member.profileImage),
             memberNickname = member.nickname,
             createdAt = toEpochMilli(entity.createdAt),
-            comment = entity.comment
+            comment = entity.comment,
+            languageCode = entity.languageCode
         )
     }
 
     @Transactional
-    fun addComment(characterId: Long, member: Member, text: String): Long {
+    fun addComment(characterId: Long, member: Member, text: String, languageCode: String? = null): Long {
         val character = chatCharacterRepository.findById(characterId).orElseThrow { SodaException("캐릭터를 찾을 수 없습니다.") }
         if (!character.isActive) throw SodaException("비활성화된 캐릭터입니다.")
         if (text.isBlank()) throw SodaException("댓글 내용을 입력해주세요.")
 
-        val entity = CharacterComment(comment = text)
+        val entity = CharacterComment(comment = text, languageCode = languageCode)
         entity.chatCharacter = character
         entity.member = member
         commentRepository.save(entity)
+
+        // 언어 코드가 지정되지 않은 경우, 파파고 언어 감지 API를 통해 비동기로 언어를 식별한다.
+        if (languageCode.isNullOrBlank()) {
+            applicationEventPublisher.publishEvent(
+                LanguageDetectEvent(
+                    id = entity.id!!,
+                    query = text,
+                    targetType = LanguageDetectTargetType.CHARACTER_COMMENT
+                )
+            )
+        }
+
         return entity.id!!
     }
 
     @Transactional
-    fun addReply(characterId: Long, parentCommentId: Long, member: Member, text: String): Long {
+    fun addReply(
+        characterId: Long,
+        parentCommentId: Long,
+        member: Member,
+        text: String,
+        languageCode: String? = null
+    ): Long {
         val character = chatCharacterRepository.findById(characterId).orElseThrow { SodaException("캐릭터를 찾을 수 없습니다.") }
         if (!character.isActive) throw SodaException("비활성화된 캐릭터입니다.")
         val parent = commentRepository.findById(parentCommentId).orElseThrow { SodaException("댓글을 찾을 수 없습니다.") }
@@ -78,11 +102,23 @@ class CharacterCommentService(
         if (!parent.isActive) throw SodaException("비활성화된 댓글입니다.")
         if (text.isBlank()) throw SodaException("댓글 내용을 입력해주세요.")
 
-        val entity = CharacterComment(comment = text)
+        val entity = CharacterComment(comment = text, languageCode = languageCode)
         entity.chatCharacter = character
         entity.member = member
         entity.parent = parent
         commentRepository.save(entity)
+
+        // 언어 코드가 지정되지 않은 경우, 파파고 언어 감지 API를 통해 비동기로 언어를 식별한다.
+        if (languageCode.isNullOrBlank()) {
+            applicationEventPublisher.publishEvent(
+                LanguageDetectEvent(
+                    id = entity.id!!,
+                    query = text,
+                    targetType = LanguageDetectTargetType.CHARACTER_COMMENT
+                )
+            )
+        }
+
         return entity.id!!
     }
 

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/controller/ChatCharacterController.kt

@@ -1,6 +1,7 @@
 package kr.co.vividnext.sodalive.chat.character.controller
 
 import kr.co.vividnext.sodalive.chat.character.comment.CharacterCommentService
+import kr.co.vividnext.sodalive.chat.character.curation.CharacterCurationQueryService
 import kr.co.vividnext.sodalive.chat.character.dto.Character
 import kr.co.vividnext.sodalive.chat.character.dto.CharacterBackgroundResponse
 import kr.co.vividnext.sodalive.chat.character.dto.CharacterBannerResponse
@@ -10,11 +11,21 @@ import kr.co.vividnext.sodalive.chat.character.dto.CharacterPersonalityResponse
 import kr.co.vividnext.sodalive.chat.character.dto.CurationSection
 import kr.co.vividnext.sodalive.chat.character.dto.OtherCharacter
 import kr.co.vividnext.sodalive.chat.character.dto.RecentCharacter
+import kr.co.vividnext.sodalive.chat.character.dto.RecentCharactersResponse
 import kr.co.vividnext.sodalive.chat.character.service.ChatCharacterBannerService
 import kr.co.vividnext.sodalive.chat.character.service.ChatCharacterService
+import kr.co.vividnext.sodalive.chat.character.translate.AiCharacterTranslation
+import kr.co.vividnext.sodalive.chat.character.translate.AiCharacterTranslationRenderedPayload
+import kr.co.vividnext.sodalive.chat.character.translate.AiCharacterTranslationRepository
+import kr.co.vividnext.sodalive.chat.character.translate.TranslatedAiCharacterBackground
+import kr.co.vividnext.sodalive.chat.character.translate.TranslatedAiCharacterDetail
+import kr.co.vividnext.sodalive.chat.character.translate.TranslatedAiCharacterPersonality
 import kr.co.vividnext.sodalive.chat.room.service.ChatRoomService
 import kr.co.vividnext.sodalive.common.ApiResponse
 import kr.co.vividnext.sodalive.common.SodaException
+import kr.co.vividnext.sodalive.i18n.LangContext
+import kr.co.vividnext.sodalive.i18n.translation.PapagoTranslationService
+import kr.co.vividnext.sodalive.i18n.translation.TranslateRequest
 import kr.co.vividnext.sodalive.member.Member
 import org.springframework.beans.factory.annotation.Value
 import org.springframework.data.domain.PageRequest
@@ -32,7 +43,12 @@ class ChatCharacterController(
     private val bannerService: ChatCharacterBannerService,
     private val chatRoomService: ChatRoomService,
     private val characterCommentService: CharacterCommentService,
-    private val curationQueryService: kr.co.vividnext.sodalive.chat.character.curation.CharacterCurationQueryService,
+    private val curationQueryService: CharacterCurationQueryService,
+
+    private val translationService: PapagoTranslationService,
+    private val aiCharacterTranslationRepository: AiCharacterTranslationRepository,
+
+    private val langContext: LangContext,
 
     @Value("\${cloud.aws.cloud-front.host}")
     private val imageHost: String
@@ -65,6 +81,24 @@ class ChatCharacterController(
                 }
         }
 
+        val characterIds = recentCharacters.map { it.characterId }
+        val translatedRecentCharacters = if (characterIds.isNotEmpty()) {
+            val translations = aiCharacterTranslationRepository
+                .findByCharacterIdInAndLocale(characterIds = characterIds, locale = langContext.lang.code)
+                .associateBy { it.characterId }
+
+            recentCharacters.map { character ->
+                val translatedName = translations[character.characterId]?.renderedPayload?.name
+                if (translatedName.isNullOrBlank()) {
+                    character
+                } else {
+                    character.copy(name = translatedName)
+                }
+            }
+        } else {
+            recentCharacters
+        }
+
         // 인기 캐릭터 조회
         val popularCharacters = service.getPopularCharacters()
 
@@ -103,10 +137,10 @@ class ChatCharacterController(
         ApiResponse.ok(
             CharacterMainResponse(
                 banners = banners,
-                recentCharacters = recentCharacters,
+                recentCharacters = translatedRecentCharacters,
-                popularCharacters = popularCharacters,
+                popularCharacters = getTranslatedAiCharacterList(popularCharacters),
-                newCharacters = newCharacters,
+                newCharacters = getTranslatedAiCharacterList(newCharacters),
-                recommendCharacters = recommendCharacters,
+                recommendCharacters = getTranslatedAiCharacterList(recommendCharacters),
                 curationSections = curationSections
             )
         )
@@ -148,6 +182,118 @@ class ChatCharacterController(
             )
         }
 
+        var translated: TranslatedAiCharacterDetail? = null
+        if (langContext.lang.code != character.languageCode) {
+            val existing = aiCharacterTranslationRepository
+                .findByCharacterIdAndLocale(character.id!!, langContext.lang.code)
+
+            if (existing != null) {
+                val payload = existing.renderedPayload
+                translated = TranslatedAiCharacterDetail(
+                    name = payload.name,
+                    description = payload.description,
+                    gender = payload.gender,
+                    personality = TranslatedAiCharacterPersonality(
+                        trait = payload.personalityTrait,
+                        description = payload.personalityDescription
+                    ).takeIf {
+                        (it.trait?.isNotBlank() == true) || (it.description?.isNotBlank() == true)
+                    },
+                    background = TranslatedAiCharacterBackground(
+                        topic = payload.backgroundTopic,
+                        description = payload.backgroundDescription
+                    ).takeIf {
+                        (it.topic?.isNotBlank() == true) || (it.description?.isNotBlank() == true)
+                    },
+                    tags = payload.tags
+                )
+            } else {
+                val texts = mutableListOf<String>()
+                texts.add(character.name)
+                texts.add(character.description)
+                texts.add(character.gender ?: "")
+
+                val hasPersonality = personality != null
+                if (hasPersonality) {
+                    texts.add(personality!!.trait)
+                    texts.add(personality.description)
+                }
+
+                val hasBackground = background != null
+                if (hasBackground) {
+                    texts.add(background!!.topic)
+                    texts.add(background.description)
+                }
+
+                texts.add(tags)
+
+                val sourceLanguage = character.languageCode ?: "ko"
+
+                val response = translationService.translate(
+                    request = TranslateRequest(
+                        texts = texts,
+                        sourceLanguage = sourceLanguage,
+                        targetLanguage = langContext.lang.code
+                    )
+                )
+
+                val translatedTexts = response.translatedText
+                if (translatedTexts.size == texts.size) {
+                    var index = 0
+
+                    val translatedName = translatedTexts[index++]
+                    val translatedDescription = translatedTexts[index++]
+                    val translatedGender = translatedTexts[index++]
+
+                    var translatedPersonality: TranslatedAiCharacterPersonality? = null
+                    if (hasPersonality) {
+                        translatedPersonality = TranslatedAiCharacterPersonality(
+                            trait = translatedTexts[index++],
+                            description = translatedTexts[index++]
+                        )
+                    }
+
+                    var translatedBackground: TranslatedAiCharacterBackground? = null
+                    if (hasBackground) {
+                        translatedBackground = TranslatedAiCharacterBackground(
+                            topic = translatedTexts[index++],
+                            description = translatedTexts[index++]
+                        )
+                    }
+
+                    val translatedTags = translatedTexts[index]
+
+                    val payload = AiCharacterTranslationRenderedPayload(
+                        name = translatedName,
+                        description = translatedDescription,
+                        gender = translatedGender,
+                        personalityTrait = translatedPersonality?.trait ?: "",
+                        personalityDescription = translatedPersonality?.description ?: "",
+                        backgroundTopic = translatedBackground?.topic ?: "",
+                        backgroundDescription = translatedBackground?.description ?: "",
+                        tags = translatedTags
+                    )
+
+                    val entity = AiCharacterTranslation(
+                        characterId = character.id!!,
+                        locale = langContext.lang.code,
+                        renderedPayload = payload
+                    )
+
+                    aiCharacterTranslationRepository.save(entity)
+
+                    translated = TranslatedAiCharacterDetail(
+                        name = translatedName,
+                        description = translatedDescription,
+                        gender = translatedGender,
+                        personality = translatedPersonality,
+                        background = translatedBackground,
+                        tags = translatedTags
+                    )
+                }
+            }
+        }
+
         // 다른 캐릭터 조회 (태그 기반, 랜덤 10개, 현재 캐릭터 제외)
         val others = service.getOtherCharactersBySharedTags(characterId, 10)
             .map { other ->
@@ -162,6 +308,35 @@ class ChatCharacterController(
                 )
             }
 
+        /**
+         * 다른 캐릭터 이름, 태그 번역 데이터 조회
+         *
+         * languageCode != null
+         * aiCharacterTranslationRepository 이용해 번역 콘텐츠를 조회한다. - characterId, locale
+         *
+         * 한 번에 조회하고 characterId 매핑하여 others 캐릭터 이름과 tags 번역 데이터로 변경한다
+         */
+        val characterIds = others.map { it.characterId }
+        val translatedOthers = if (characterIds.isNotEmpty()) {
+            val translations = aiCharacterTranslationRepository
+                .findByCharacterIdInAndLocale(characterIds = characterIds, locale = langContext.lang.code)
+                .associateBy { it.characterId }
+
+            others.map { other ->
+                val payload = translations[other.characterId]?.renderedPayload
+                val translatedName = payload?.name
+                val translatedTags = payload?.tags
+
+                if (translatedName.isNullOrBlank() || translatedTags.isNullOrBlank()) {
+                    other
+                } else {
+                    other.copy(name = translatedName, tags = translatedTags)
+                }
+            }
+        } else {
+            others
+        }
+
         // 최신 댓글 1개 조회
         val latestComment = characterCommentService.getLatestComment(imageHost, character.id!!)
 
@@ -171,6 +346,7 @@ class ChatCharacterController(
                 characterId = character.id!!,
                 name = character.name,
                 description = character.description,
+                languageCode = character.languageCode,
                 mbti = character.mbti,
                 gender = character.gender,
                 age = character.age,
@@ -181,9 +357,10 @@ class ChatCharacterController(
                 originalTitle = character.originalTitle,
                 originalLink = character.originalLink,
                 characterType = character.characterType,
-                others = others,
+                others = translatedOthers,
                 latestComment = latestComment,
-                totalComments = characterCommentService.getTotalCommentCount(character.id!!)
+                totalComments = characterCommentService.getTotalCommentCount(character.id!!),
+                translated = translated
             )
         )
     }
@@ -194,13 +371,20 @@ class ChatCharacterController(
      * - 예외: 2주 이내 캐릭터가 0개인 경우, 최근 등록한 캐릭터 20개만 제공
      */
     @GetMapping("/recent")
-    fun getRecentCharacters(@RequestParam("page", required = false) page: Int?) = run {
+    fun getRecentCharacters(
-        ApiResponse.ok(
+        @RequestParam("page", required = false) page: Int?
-            service.getRecentCharactersPage(
+    ): ApiResponse<RecentCharactersResponse> = run {
+        val characterPage = service.getRecentCharactersPage(
             page = page ?: 0,
             size = 20
         )
+
+        val translatedCharacterPage = RecentCharactersResponse(
+            totalCount = characterPage.totalCount,
+            content = getTranslatedAiCharacterList(characterPage.content)
         )
+
+        ApiResponse.ok(translatedCharacterPage)
     }
 
     /**
@@ -219,6 +403,48 @@ class ChatCharacterController(
                 .listMyChatRooms(member, 0, 50) // 최근 기록은 최대 50개까지만 제외 대상으로 고려
                 .map { it.characterId }
         }
-        ApiResponse.ok(service.getRecommendCharacters(recent, 20))
+
+        ApiResponse.ok(
+            getTranslatedAiCharacterList(
+                service.getRecommendCharacters(
+                    recent,
+                    20
+                )
+            )
+        )
+    }
+
+    /**
+     * AI 캐릭터 리스트의 이름/설명을 현재 언어(locale)에 맞춰 일괄 번역한다.
+     *
+     * 처리 절차:
+     * - characterId 목록을 추출하고, 요청 언어 코드로 aiCharacterTranslationRepository에서
+     *   번역 데이터를 한 번에 조회한다.
+     * - 각 캐릭터에 대해 name과 description 모두 번역 값이 존재하고 비어있지 않을 때에만
+     *   해당 필드를 교체한다. 둘 중 하나라도 없으면 원본 캐릭터를 그대로 유지한다.
+     *
+     * @param aiCharacterList 번역 대상 캐릭터 목록
+     * @return 가능한 경우 name/description이 번역된 캐릭터 목록, 그 외는 원본 유지
+     */
+    private fun getTranslatedAiCharacterList(aiCharacterList: List<Character>): List<Character> {
+        val characterIds = aiCharacterList.map { it.characterId }
+
+        return if (characterIds.isNotEmpty()) {
+            val translations = aiCharacterTranslationRepository
+                .findByCharacterIdInAndLocale(characterIds = characterIds, locale = langContext.lang.code)
+                .associateBy { it.characterId }
+
+            aiCharacterList.map { character ->
+                val translatedName = translations[character.characterId]?.renderedPayload?.name
+                val translatedDesc = translations[character.characterId]?.renderedPayload?.description
+                if (translatedName.isNullOrBlank() || translatedDesc.isNullOrBlank()) {
+                    character
+                } else {
+                    character.copy(name = translatedName, description = translatedDesc)
+                }
+            }
+        } else {
+            aiCharacterList
+        }
     }
 }

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/dto/CharacterDetailResponse.kt

@@ -2,11 +2,13 @@ package kr.co.vividnext.sodalive.chat.character.dto
 
 import kr.co.vividnext.sodalive.chat.character.CharacterType
 import kr.co.vividnext.sodalive.chat.character.comment.CharacterCommentResponse
+import kr.co.vividnext.sodalive.chat.character.translate.TranslatedAiCharacterDetail
 
 data class CharacterDetailResponse(
     val characterId: Long,
     val name: String,
     val description: String,
+    val languageCode: String?,
     val mbti: String?,
     val gender: String?,
     val age: Int?,
@@ -19,7 +21,8 @@ data class CharacterDetailResponse(
     val characterType: CharacterType,
     val others: List<OtherCharacter>,
     val latestComment: CharacterCommentResponse?,
-    val totalComments: Int
+    val totalComments: Int,
+    val translated: TranslatedAiCharacterDetail?
 )
 
 data class OtherCharacter(

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/translate/AiCharacterTranslation.kt

@@ -0,0 +1,87 @@
+package kr.co.vividnext.sodalive.chat.character.translate
+
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.module.kotlin.readValue
+import kr.co.vividnext.sodalive.common.BaseEntity
+import javax.persistence.AttributeConverter
+import javax.persistence.Column
+import javax.persistence.Convert
+import javax.persistence.Converter
+import javax.persistence.Entity
+import javax.persistence.Table
+import javax.persistence.UniqueConstraint
+
+@Entity
+@Table(
+    uniqueConstraints = [
+        UniqueConstraint(columnNames = ["characterId", "locale"])
+    ]
+)
+class AiCharacterTranslation(
+    val characterId: Long,
+    val locale: String,
+
+    @Column(columnDefinition = "json")
+    @Convert(converter = AiCharacterTranslationRenderedPayloadConverter::class)
+    var renderedPayload: AiCharacterTranslationRenderedPayload
+) : BaseEntity()
+
+data class AiCharacterTranslationRenderedPayload(
+    val name: String,
+    val description: String,
+    val gender: String,
+    val personalityTrait: String,
+    val personalityDescription: String,
+    val backgroundTopic: String,
+    val backgroundDescription: String,
+    val tags: String
+)
+
+@Converter(autoApply = false)
+class AiCharacterTranslationRenderedPayloadConverter :
+    AttributeConverter<AiCharacterTranslationRenderedPayload, String> {
+
+    override fun convertToDatabaseColumn(attribute: AiCharacterTranslationRenderedPayload?): String {
+        if (attribute == null) return "{}"
+        return objectMapper.writeValueAsString(attribute)
+    }
+
+    override fun convertToEntityAttribute(dbData: String?): AiCharacterTranslationRenderedPayload {
+        if (dbData.isNullOrBlank()) {
+            return AiCharacterTranslationRenderedPayload(
+                name = "",
+                description = "",
+                gender = "",
+                personalityTrait = "",
+                personalityDescription = "",
+                backgroundTopic = "",
+                backgroundDescription = "",
+                tags = ""
+            )
+        }
+        return objectMapper.readValue(dbData)
+    }
+
+    companion object {
+        private val objectMapper = jacksonObjectMapper()
+    }
+}
+
+data class TranslatedAiCharacterDetail(
+    val name: String?,
+    val description: String?,
+    val gender: String?,
+    val personality: TranslatedAiCharacterPersonality?,
+    val background: TranslatedAiCharacterBackground?,
+    val tags: String?
+)
+
+data class TranslatedAiCharacterPersonality(
+    val trait: String?,
+    val description: String?
+)
+
+data class TranslatedAiCharacterBackground(
+    val topic: String?,
+    val description: String?
+)

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/translate/AiCharacterTranslationRepository.kt

@@ -0,0 +1,9 @@
+package kr.co.vividnext.sodalive.chat.character.translate
+
+import org.springframework.data.jpa.repository.JpaRepository
+
+interface AiCharacterTranslationRepository : JpaRepository<AiCharacterTranslation, Long> {
+    fun findByCharacterIdAndLocale(characterId: Long, locale: String): AiCharacterTranslation?
+
+    fun findByCharacterIdInAndLocale(characterIds: List<Long>, locale: String): List<AiCharacterTranslation>
+}

src/main/kotlin/kr/co/vividnext/sodalive/chat/original/OriginalWork.kt

@@ -33,6 +33,10 @@ class OriginalWork(
     @Column(columnDefinition = "TEXT")
     var description: String = "",
 
+    /** 언어 코드 */
+    @Column(nullable = true)
+    var languageCode: String? = null,
+
     /** 원천 원작 */
     @Column(nullable = true)
     var originalWork: String? = null,

src/main/kotlin/kr/co/vividnext/sodalive/chat/original/controller/OriginalWorkController.kt

@@ -3,12 +3,16 @@ package kr.co.vividnext.sodalive.chat.original.controller
 import kr.co.vividnext.sodalive.chat.character.ChatCharacter
 import kr.co.vividnext.sodalive.chat.character.dto.Character
 import kr.co.vividnext.sodalive.chat.character.image.CharacterImageRepository
+import kr.co.vividnext.sodalive.chat.character.translate.AiCharacterTranslationRepository
 import kr.co.vividnext.sodalive.chat.original.dto.OriginalWorkDetailResponse
 import kr.co.vividnext.sodalive.chat.original.dto.OriginalWorkListItemResponse
 import kr.co.vividnext.sodalive.chat.original.dto.OriginalWorkListResponse
 import kr.co.vividnext.sodalive.chat.original.service.OriginalWorkQueryService
+import kr.co.vividnext.sodalive.chat.original.service.OriginalWorkTranslationService
+import kr.co.vividnext.sodalive.chat.original.translation.OriginalWorkTranslationRepository
 import kr.co.vividnext.sodalive.common.ApiResponse
 import kr.co.vividnext.sodalive.common.SodaException
+import kr.co.vividnext.sodalive.i18n.LangContext
 import kr.co.vividnext.sodalive.member.Member
 import org.springframework.beans.factory.annotation.Value
 import org.springframework.security.core.annotation.AuthenticationPrincipal
@@ -30,6 +34,12 @@ class OriginalWorkController(
     private val queryService: OriginalWorkQueryService,
     private val characterImageRepository: CharacterImageRepository,
 
+    private val langContext: LangContext,
+
+    private val originalWorkTranslationService: OriginalWorkTranslationService,
+    private val originalWorkTranslationRepository: OriginalWorkTranslationRepository,
+    private val aiCharacterTranslationRepository: AiCharacterTranslationRepository,
+
     @Value("\${cloud.aws.cloud-front.host}")
     private val imageHost: String
 ) {
@@ -51,7 +61,57 @@ class OriginalWorkController(
         val includeAdult = member?.auth != null
         val pageRes = queryService.listForAppPage(includeAdult, page, size)
         val content = pageRes.content.map { OriginalWorkListItemResponse.from(it, imageHost) }
-        ApiResponse.ok(OriginalWorkListResponse(totalCount = pageRes.totalElements, content = content))
+
+        /**
+         * 원작 목록의 제목과 콘텐츠 타입을 현재 언어(locale)에 맞춰 일괄 번역한다.
+         *
+         * 처리 절차:
+         * - 입력된 원작들의 originalWorkId 집합을 만들고, 요청 언어 코드(langContext.lang.code)로
+         *   originalWorkTranslationRepository 번역 데이터를 한 번에 조회한다.
+         * - 각 항목에 대해 번역된 제목과 콘텐츠 타입이 존재하고 비어있지 않으면 title과 contentType을 번역 값으로 교체한다.
+         * - 번역이 없거나 공백이면 원본 항목을 그대로 반환한다.
+         *
+         * 성능:
+         * - N건의 항목을 1회의 조회로 해결하기 위해 IN 쿼리를 사용한다.
+         */
+        val translatedContent = run {
+            if (content.isEmpty()) {
+                content
+            } else {
+                val ids = content.map { it.id }.toSet()
+                val locale = langContext.lang.code
+                val translations = originalWorkTranslationRepository
+                    .findByOriginalWorkIdInAndLocale(ids, locale)
+                    .associateBy { it.originalWorkId }
+
+                content.map { item ->
+                    val payload = translations[item.id]?.renderedPayload
+                    if (payload != null) {
+                        val newTitle = payload.title.trim()
+                        val newContentType = payload.contentType.trim()
+                        val hasTitle = newTitle.isNotEmpty()
+                        val hasContentType = newContentType.isNotEmpty()
+                        if (hasTitle || hasContentType) {
+                            item.copy(
+                                title = if (hasTitle) newTitle else item.title,
+                                contentType = if (hasContentType) newContentType else item.contentType
+                            )
+                        } else {
+                            item
+                        }
+                    } else {
+                        item
+                    }
+                }
+            }
+        }
+
+        ApiResponse.ok(
+            OriginalWorkListResponse(
+                totalCount = pageRes.totalElements,
+                content = translatedContent
+            )
+        )
     }
 
     /**
@@ -83,20 +143,56 @@ class OriginalWorkController(
             emptySet()
         }
 
-        ApiResponse.ok(
+        val translatedOriginal = originalWorkTranslationService.ensureTranslated(
-            OriginalWorkDetailResponse.from(
+            originalWork = ow,
-                ow,
+            targetLocale = langContext.lang.code
-                imageHost,
+        )
+
+        /**
+         * 캐릭터 리스트의 캐릭터 이름(name)과 캐릭터 한 줄 소개(description)를 현재 언어(locale)에 맞춰 일괄 번역한다.
+         *
+         * 처리 절차:
+         * - 입력된 콘텐츠들의 characterId 집합을 만들고, 요청 언어 코드(langContext.lang.code)로
+         *   AiCharacterTranslationRepository에서 번역 데이터를 한 번에 조회한다.
+         * - 각 항목에 대해 번역된 캐릭터 이름(name)과 캐릭터 한 줄 소개(description)가 존재하고 비어있지 않으면 번역 값으로 교체한다.
+         * - 번역이 없거나 공백이면 원본 항목을 그대로 반환한다.
+         *
+         * 성능:
+         * - N건의 항목을 1회의 조회로 해결하기 위해 IN 쿼리를 사용한다.
+         */
+        val translatedCharacters = run {
+            if (chars.isEmpty()) {
+                emptyList<Character>()
+            } else {
+                val ids = chars.mapNotNull { it.id }
+                val translations = aiCharacterTranslationRepository
+                    .findByCharacterIdInAndLocale(ids, langContext.lang.code)
+                    .associateBy { it.characterId }
+
                 chars.map<ChatCharacter, Character> {
                     val path = it.imagePath ?: "profile/default-profile.png"
+                    val tr = translations[it.id!!]?.renderedPayload
+                    val newName = tr?.name?.trim().orEmpty()
+                    val newDesc = tr?.description?.trim().orEmpty()
+                    val hasName = newName.isNotEmpty()
+                    val hasDesc = newDesc.isNotEmpty()
                     Character(
                         characterId = it.id!!,
-                        name = it.name,
+                        name = if (hasName) newName else it.name,
-                        description = it.description,
+                        description = if (hasDesc) newDesc else it.description,
                         imageUrl = "$imageHost/$path",
                         new = recentSet.contains(it.id)
                     )
                 }
+            }
+        }
+
+        ApiResponse.ok(
+            OriginalWorkDetailResponse.from(
+                ow,
+                imageHost,
+                translatedCharacters,
+                translated = translatedOriginal
             )
         )
     }

src/main/kotlin/kr/co/vividnext/sodalive/chat/original/dto/OriginalWorkAppDtos.kt

@@ -3,6 +3,7 @@ package kr.co.vividnext.sodalive.chat.original.dto
 import com.fasterxml.jackson.annotation.JsonProperty
 import kr.co.vividnext.sodalive.chat.character.dto.Character
 import kr.co.vividnext.sodalive.chat.original.OriginalWork
+import kr.co.vividnext.sodalive.chat.original.translation.TranslatedOriginalWork
 
 /**
  * 앱용 원작 목록 아이템 응답 DTO
@@ -54,13 +55,15 @@ data class OriginalWorkDetailResponse(
     @JsonProperty("studio") val studio: String?,
     @JsonProperty("originalLinks") val originalLinks: List<String>,
     @JsonProperty("tags") val tags: List<String>,
-    @JsonProperty("characters") val characters: List<Character>
+    @JsonProperty("characters") val characters: List<Character>,
+    @JsonProperty("translated") val translated: TranslatedOriginalWork?
 ) {
     companion object {
         fun from(
             entity: OriginalWork,
             imageHost: String = "",
-            characters: List<Character>
+            characters: List<Character>,
+            translated: TranslatedOriginalWork?
         ): OriginalWorkDetailResponse {
             val fullImage = if (entity.imagePath != null && imageHost.isNotEmpty()) {
                 "$imageHost/${entity.imagePath}"
@@ -80,7 +83,8 @@ data class OriginalWorkDetailResponse(
                 studio = entity.studio,
                 originalLinks = entity.originalLinks.map { it.url },
                 tags = entity.tagMappings.map { it.tag.tag },
-                characters = characters
+                characters = characters,
+                translated = translated
             )
         }
     }

src/main/kotlin/kr/co/vividnext/sodalive/chat/original/service/OriginalWorkTranslationService.kt

@@ -0,0 +1,124 @@
+package kr.co.vividnext.sodalive.chat.original.service
+
+import kr.co.vividnext.sodalive.chat.original.OriginalWork
+import kr.co.vividnext.sodalive.chat.original.translation.OriginalWorkTranslation
+import kr.co.vividnext.sodalive.chat.original.translation.OriginalWorkTranslationPayload
+import kr.co.vividnext.sodalive.chat.original.translation.OriginalWorkTranslationRepository
+import kr.co.vividnext.sodalive.chat.original.translation.TranslatedOriginalWork
+import kr.co.vividnext.sodalive.i18n.translation.PapagoTranslationService
+import kr.co.vividnext.sodalive.i18n.translation.TranslateRequest
+import org.slf4j.LoggerFactory
+import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
+
+@Service
+class OriginalWorkTranslationService(
+    private val translationRepository: OriginalWorkTranslationRepository,
+    private val papagoTranslationService: PapagoTranslationService
+) {
+
+    private val log = LoggerFactory.getLogger(javaClass)
+
+    /**
+     * 원작의 언어와 요청 언어가 다를 때 번역 데이터를 확보하고 반환한다.
+     * - 기존 번역이 있으면 그대로 사용
+     * - 없으면 파파고 번역 수행 후 저장
+     * - 실패/불필요 시 null 반환
+     */
+    @Transactional
+    fun ensureTranslated(originalWork: OriginalWork, targetLocale: String): TranslatedOriginalWork? {
+        val source = originalWork.languageCode?.lowercase()
+        val target = targetLocale.lowercase()
+
+        if (source.isNullOrBlank() || source == target) {
+            return null
+        }
+
+        // 기존 번역 조회
+        val existed = translationRepository.findByOriginalWorkIdAndLocale(originalWork.id!!, target)
+        val existedPayload = existed?.renderedPayload
+        if (existedPayload != null) {
+            val t = existedPayload.title.trim()
+            val ct = existedPayload.contentType.trim()
+            val cat = existedPayload.category.trim()
+            val desc = existedPayload.description.trim()
+            val tags = existedPayload.tags
+            val hasAny = t.isNotEmpty() || ct.isNotEmpty() || cat.isNotEmpty() || desc.isNotEmpty() || tags.isNotEmpty()
+            if (hasAny) {
+                return TranslatedOriginalWork(
+                    title = t,
+                    contentType = ct,
+                    category = cat,
+                    description = desc,
+                    tags = tags
+                )
+            }
+        }
+
+        // 파파고 번역 수행
+        return try {
+            val tags = originalWork.tagMappings.map { it.tag.tag }.filter { it.isNotBlank() }
+            val texts = buildList {
+                add(originalWork.title)
+                add(originalWork.contentType)
+                add(originalWork.category)
+                add(originalWork.description)
+                addAll(tags)
+            }
+
+            val response = papagoTranslationService.translate(
+                TranslateRequest(
+                    texts = texts,
+                    sourceLanguage = source,
+                    targetLanguage = target
+                )
+            )
+
+            val out = response.translatedText
+            if (out.isEmpty()) return null
+
+            // 앞 4개는 필드, 나머지는 태그
+            val title = out.getOrNull(0)?.trim().orEmpty()
+            val contentType = out.getOrNull(1)?.trim().orEmpty()
+            val category = out.getOrNull(2)?.trim().orEmpty()
+            val description = out.getOrNull(3)?.trim().orEmpty()
+            val translatedTags = if (out.size > 4) {
+                out.drop(4).map { it.trim() }.filter { it.isNotEmpty() }
+            } else {
+                emptyList()
+            }
+
+            val hasAny = title.isNotEmpty() || contentType.isNotEmpty() ||
+                category.isNotEmpty() || description.isNotEmpty() || translatedTags.isNotEmpty()
+            if (!hasAny) return null
+
+            val payload = OriginalWorkTranslationPayload(
+                title = title,
+                contentType = contentType,
+                category = category,
+                description = description,
+                tags = translatedTags
+            )
+
+            val entity = existed?.apply { this.renderedPayload = payload }
+                ?: OriginalWorkTranslation(
+                    originalWorkId = originalWork.id!!,
+                    locale = target,
+                    renderedPayload = payload
+                )
+
+            translationRepository.save(entity)
+
+            TranslatedOriginalWork(
+                title = title,
+                contentType = contentType,
+                category = category,
+                description = description,
+                tags = translatedTags
+            )
+        } catch (e: Exception) {
+            log.warn("Failed to translate OriginalWork(id={}) from {} to {}: {}", originalWork.id, source, target, e.message)
+            null
+        }
+    }
+}

src/main/kotlin/kr/co/vividnext/sodalive/chat/original/translation/OriginalWorkTranslation.kt

@@ -0,0 +1,102 @@
+package kr.co.vividnext.sodalive.chat.original.translation
+
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import kr.co.vividnext.sodalive.common.BaseEntity
+import javax.persistence.AttributeConverter
+import javax.persistence.Column
+import javax.persistence.Convert
+import javax.persistence.Converter
+import javax.persistence.Entity
+import javax.persistence.Table
+import javax.persistence.UniqueConstraint
+
+@Entity
+@Table(
+    uniqueConstraints = [
+        UniqueConstraint(columnNames = ["original_work_id", "locale"])
+    ]
+)
+class OriginalWorkTranslation(
+    @Column(name = "original_work_id")
+    val originalWorkId: Long,
+    @Column(name = "locale")
+    val locale: String,
+
+    @Column(columnDefinition = "json")
+    @Convert(converter = OriginalWorkTranslationPayloadConverter::class)
+    var renderedPayload: OriginalWorkTranslationPayload
+) : BaseEntity()
+
+data class OriginalWorkTranslationPayload(
+    val title: String,
+    val contentType: String,
+    val category: String,
+    val description: String,
+    val tags: List<String>
+)
+
+data class TranslatedOriginalWork(
+    val title: String,
+    val contentType: String,
+    val category: String,
+    val description: String,
+    val tags: List<String>
+)
+
+@Converter(autoApply = false)
+class OriginalWorkTranslationPayloadConverter : AttributeConverter<OriginalWorkTranslationPayload, String> {
+
+    override fun convertToDatabaseColumn(attribute: OriginalWorkTranslationPayload?): String {
+        if (attribute == null) return "{}"
+        return objectMapper.writeValueAsString(attribute)
+    }
+
+    override fun convertToEntityAttribute(dbData: String?): OriginalWorkTranslationPayload {
+        if (dbData.isNullOrBlank()) {
+            return OriginalWorkTranslationPayload(
+                title = "",
+                contentType = "",
+                category = "",
+                description = "",
+                tags = emptyList()
+            )
+        }
+        return try {
+            val node = objectMapper.readTree(dbData)
+            val title = node.get("title")?.asText() ?: ""
+            val contentType = node.get("contentType")?.asText() ?: ""
+            val category = node.get("category")?.asText() ?: ""
+            val description = node.get("description")?.asText() ?: ""
+            val tagsNode = node.get("tags")
+            val tags: List<String> = when {
+                tagsNode == null || tagsNode.isNull -> emptyList()
+                tagsNode.isArray -> tagsNode.mapNotNull { it.asText(null) }.filter { it.isNotBlank() }
+                tagsNode.isTextual -> tagsNode.asText()
+                    .split(',')
+                    .map { it.trim() }
+                    .filter { it.isNotEmpty() }
+
+                else -> emptyList()
+            }
+            OriginalWorkTranslationPayload(
+                title = title,
+                contentType = contentType,
+                category = category,
+                description = description,
+                tags = tags
+            )
+        } catch (_: Exception) {
+            OriginalWorkTranslationPayload(
+                title = "",
+                contentType = "",
+                category = "",
+                description = "",
+                tags = emptyList()
+            )
+        }
+    }
+
+    companion object {
+        private val objectMapper = jacksonObjectMapper()
+    }
+}

src/main/kotlin/kr/co/vividnext/sodalive/chat/original/translation/OriginalWorkTranslationRepository.kt

@@ -0,0 +1,9 @@
+package kr.co.vividnext.sodalive.chat.original.translation
+
+import org.springframework.data.jpa.repository.JpaRepository
+
+interface OriginalWorkTranslationRepository : JpaRepository<OriginalWorkTranslation, Long> {
+    fun findByOriginalWorkIdAndLocale(originalWorkId: Long, locale: String): OriginalWorkTranslation?
+
+    fun findByOriginalWorkIdInAndLocale(originalWorkIds: Set<Long>, locale: String): List<OriginalWorkTranslation>
+}

src/main/kotlin/kr/co/vividnext/sodalive/configs/WebConfig.kt

@@ -1,11 +1,19 @@
 package kr.co.vividnext.sodalive.configs
 
+import kr.co.vividnext.sodalive.i18n.LangInterceptor
 import org.springframework.context.annotation.Configuration
 import org.springframework.web.servlet.config.annotation.CorsRegistry
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer
 
 @Configuration
-class WebConfig : WebMvcConfigurer {
+class WebConfig(
+    private val langInterceptor: LangInterceptor
+) : WebMvcConfigurer {
+    override fun addInterceptors(registry: InterceptorRegistry) {
+        registry.addInterceptor(langInterceptor).addPathPatterns("/**")
+    }
+
     override fun addCorsMappings(registry: CorsRegistry) {
         registry.addMapping("/**")
             .allowedOrigins(

src/main/kotlin/kr/co/vividnext/sodalive/content/AudioContent.kt

@@ -23,7 +23,7 @@ enum class PurchaseOption {
 }
 
 enum class SortType {
-    NEWEST, PRICE_HIGH, PRICE_LOW
+    NEWEST, PRICE_HIGH, PRICE_LOW, POPULARITY
 }
 
 @Entity
@@ -32,6 +32,7 @@ data class AudioContent(
     var title: String,
     @Column(columnDefinition = "TEXT", nullable = false)
     var detail: String,
+    var languageCode: String?,
     var playCount: Long = 0,
     var price: Int = 0,
     var releaseDate: LocalDateTime? = null,

src/main/kotlin/kr/co/vividnext/sodalive/content/AudioContentController.kt

@@ -243,6 +243,8 @@ class AudioContentController(private val service: AudioContentService) {
         @RequestParam("contentType", required = false) contentType: ContentType? = null,
         @RequestParam("isFree", required = false) isFree: Boolean? = null,
         @RequestParam("isPointAvailableOnly", required = false) isPointAvailableOnly: Boolean? = null,
+        @RequestParam("sort-type", required = false) sortType: SortType? = SortType.NEWEST,
+        @RequestParam("theme", required = false) theme: String? = null,
         @AuthenticationPrincipal(expression = "#this == 'anonymousUser' ? null : member") member: Member?,
         pageable: Pageable
     ) = run {
@@ -250,10 +252,11 @@ class AudioContentController(private val service: AudioContentService) {
 
         ApiResponse.ok(
             service.getLatestContentByTheme(
-                theme = emptyList(),
+                theme = if (theme == null) listOf() else listOf(theme),
                 contentType = contentType ?: ContentType.ALL,
                 offset = pageable.offset,
                 limit = pageable.pageSize.toLong(),
+                sortType = sortType ?: SortType.NEWEST,
                 isFree = isFree ?: false,
                 isAdult = (isAdultContentVisible ?: true) && member.auth != null,
                 isPointAvailableOnly = isPointAvailableOnly ?: false

src/main/kotlin/kr/co/vividnext/sodalive/content/AudioContentRepository.kt

@@ -180,6 +180,7 @@ interface AudioContentQueryRepository {
         contentType: ContentType,
         offset: Long,
         limit: Long,
+        sortType: SortType,
         isFree: Boolean,
         isAdult: Boolean,
         orderByRandom: Boolean = false,
@@ -241,6 +242,7 @@ class AudioContentQueryRepositoryImpl(
             SortType.NEWEST -> audioContent.releaseDate.desc()
             SortType.PRICE_HIGH -> audioContent.price.desc()
             SortType.PRICE_LOW -> audioContent.price.asc()
+            SortType.POPULARITY -> audioContent.playCount.desc()
         }
 
         var where = audioContent.member.id.eq(creatorId)
@@ -462,6 +464,12 @@ class AudioContentQueryRepositoryImpl(
                 audioContent.releaseDate.asc(),
                 audioContent.id.asc()
             )
+
+            SortType.POPULARITY -> listOf(
+                audioContent.playCount.desc(),
+                audioContent.releaseDate.asc(),
+                audioContent.id.asc()
+            )
         }
 
         var where = audioContent.isActive.isTrue
@@ -1297,6 +1305,7 @@ class AudioContentQueryRepositoryImpl(
         contentType: ContentType,
         offset: Long,
         limit: Long,
+        sortType: SortType,
         isFree: Boolean,
         isAdult: Boolean,
         orderByRandom: Boolean,
@@ -1342,7 +1351,22 @@ class AudioContentQueryRepositoryImpl(
         val orderBy = if (orderByRandom) {
             Expressions.numberTemplate(Double::class.java, "function('rand')").asc()
         } else {
+            when (sortType) {
+                SortType.NEWEST -> audioContent.releaseDate.desc()
+                SortType.PRICE_HIGH -> if (isFree) {
                     audioContent.releaseDate.desc()
+                } else {
+                    audioContent.price.desc()
+                }
+
+                SortType.PRICE_LOW -> if (isFree) {
+                    audioContent.releaseDate.asc()
+                } else {
+                    audioContent.price.desc()
+                }
+
+                SortType.POPULARITY -> audioContent.playCount.desc()
+            }
         }
 
         return queryFactory
@@ -1429,11 +1453,10 @@ class AudioContentQueryRepositoryImpl(
         isAdult: Boolean
     ): AudioContent? {
         var where = audioContent.member.id.eq(creatorId)
-            .and(
+            .and(audioContent.isActive.isTrue)
-                audioContent.isActive.isTrue
             .and(audioContent.duration.isNotNull)
-                    .or(audioContent.releaseDate.isNotNull.and(audioContent.duration.isNotNull))
+            .and(audioContent.releaseDate.isNotNull)
-            )
+            .and(audioContent.releaseDate.loe(LocalDateTime.now()))
 
         if (!isAdult) {
             where = where.and(audioContent.isAdult.isFalse)

src/main/kotlin/kr/co/vividnext/sodalive/content/AudioContentService.kt

@@ -21,10 +21,20 @@ import kr.co.vividnext.sodalive.content.order.OrderType
 import kr.co.vividnext.sodalive.content.pin.PinContent
 import kr.co.vividnext.sodalive.content.pin.PinContentRepository
 import kr.co.vividnext.sodalive.content.theme.AudioContentThemeQueryRepository
+import kr.co.vividnext.sodalive.content.theme.translation.ContentThemeTranslationRepository
+import kr.co.vividnext.sodalive.content.translation.ContentTranslation
+import kr.co.vividnext.sodalive.content.translation.ContentTranslationPayload
+import kr.co.vividnext.sodalive.content.translation.ContentTranslationRepository
+import kr.co.vividnext.sodalive.content.translation.TranslatedContent
 import kr.co.vividnext.sodalive.explorer.ExplorerQueryRepository
 import kr.co.vividnext.sodalive.extensions.convertLocalDateTime
 import kr.co.vividnext.sodalive.fcm.FcmEvent
 import kr.co.vividnext.sodalive.fcm.FcmEventType
+import kr.co.vividnext.sodalive.i18n.LangContext
+import kr.co.vividnext.sodalive.i18n.translation.LanguageTranslationEvent
+import kr.co.vividnext.sodalive.i18n.translation.LanguageTranslationTargetType
+import kr.co.vividnext.sodalive.i18n.translation.PapagoTranslationService
+import kr.co.vividnext.sodalive.i18n.translation.TranslateRequest
 import kr.co.vividnext.sodalive.member.Member
 import kr.co.vividnext.sodalive.member.block.BlockMemberRepository
 import kr.co.vividnext.sodalive.utils.generateFileName
@@ -56,11 +66,18 @@ class AudioContentService(
     private val audioContentLikeRepository: AudioContentLikeRepository,
     private val pinContentRepository: PinContentRepository,
 
+    private val translationService: PapagoTranslationService,
+    private val contentTranslationRepository: ContentTranslationRepository,
+
     private val s3Uploader: S3Uploader,
     private val objectMapper: ObjectMapper,
     private val audioContentCloudFront: AudioContentCloudFront,
     private val applicationEventPublisher: ApplicationEventPublisher,
 
+    private val langContext: LangContext,
+
+    private val contentThemeTranslationRepository: ContentThemeTranslationRepository,
+
     @Value("\${cloud.aws.s3.content-bucket}")
     private val audioContentBucket: String,
 
@@ -160,6 +177,13 @@ class AudioContentService(
 
             audioContent.audioContentHashTags.addAll(newAudioContentHashTagList)
         }
+
+        applicationEventPublisher.publishEvent(
+            LanguageTranslationEvent(
+                id = request.contentId,
+                targetType = LanguageTranslationTargetType.CONTENT
+            )
+        )
     }
 
     @Transactional
@@ -238,6 +262,7 @@ class AudioContentService(
         val audioContent = AudioContent(
             title = request.title.trim(),
             detail = request.detail.trim(),
+            languageCode = request.languageCode,
             price = if (request.price > 0) {
                 request.price
             } else {
@@ -331,6 +356,31 @@ class AudioContentService(
 
         audioContent.content = contentPath
 
+        // 언어 코드가 지정되지 않은 경우, 파파고 언어 감지 API를 통해 비동기로 언어를 식별한다.
+        if (audioContent.languageCode.isNullOrBlank()) {
+            val papagoQuery = listOf(
+                request.title.trim(),
+                request.detail.trim(),
+                request.tags.trim()
+            )
+                .filter { it.isNotBlank() }
+                .joinToString(" ")
+
+            applicationEventPublisher.publishEvent(
+                LanguageDetectEvent(
+                    id = audioContent.id!!,
+                    query = papagoQuery
+                )
+            )
+        } else {
+            applicationEventPublisher.publishEvent(
+                LanguageTranslationEvent(
+                    id = audioContent.id!!,
+                    targetType = LanguageTranslationTargetType.CONTENT
+                )
+            )
+        }
+
         return CreateAudioContentResponse(contentId = audioContent.id!!)
     }
 
@@ -477,6 +527,7 @@ class AudioContentService(
         }
     }
 
+    @Transactional
     fun getDetail(
         id: Long,
         member: Member,
@@ -699,13 +750,108 @@ class AudioContentService(
             listOf()
         }
 
+        var translated: TranslatedContent? = null
+
+        /**
+         * audioContent.languageCode != languageCode
+         *
+         * 번역 콘텐츠를 조회한다. - contentId, locale
+         * 번역 콘텐츠가 있으면
+         * TranslatedContent로 가공한다
+         *
+         * 번역 콘텐츠가 없으면
+         * 파파고 API를 통해 번역한 후 저장한다.
+         *
+         * 번역 대상: title, detail, tags
+         *
+         * 파파고로 번역한 데이터를 TranslatedContent로 가공한다
+         */
+        if (
+            audioContent.languageCode != null &&
+            audioContent.languageCode!!.isNotBlank() &&
+            audioContent.languageCode != langContext.lang.code
+        ) {
+            val existing = contentTranslationRepository
+                .findByContentIdAndLocale(audioContent.id!!, langContext.lang.code)
+
+            if (existing != null) {
+                val payload = existing.renderedPayload
+                translated = TranslatedContent(
+                    title = payload.title,
+                    detail = payload.detail,
+                    tags = payload.tags
+                )
+            } else {
+                val texts = mutableListOf<String>()
+                texts.add(audioContent.title)
+                texts.add(audioContent.detail)
+                texts.add(tag)
+
+                val sourceLanguage = audioContent.languageCode ?: "ko"
+
+                val response = translationService.translate(
+                    request = TranslateRequest(
+                        texts = texts,
+                        sourceLanguage = sourceLanguage,
+                        targetLanguage = langContext.lang.code
+                    )
+                )
+
+                val translatedTexts = response.translatedText
+                if (translatedTexts.size == texts.size) {
+                    var index = 0
+
+                    val translatedTitle = translatedTexts[index++]
+                    val translatedDetail = translatedTexts[index++]
+                    val translatedTags = translatedTexts[index]
+
+                    val payload = ContentTranslationPayload(
+                        title = translatedTitle,
+                        detail = translatedDetail,
+                        tags = translatedTags
+                    )
+
+                    contentTranslationRepository.save(
+                        ContentTranslation(
+                            contentId = audioContent.id!!,
+                            locale = langContext.lang.code,
+                            renderedPayload = payload
+                        )
+                    )
+
+                    translated = TranslatedContent(
+                        title = translatedTitle,
+                        detail = translatedDetail,
+                        tags = translatedTags
+                    )
+                }
+            }
+        }
+
+        /**
+         * themeStr 번역 처리
+         */
+        val themeStrTranslated = run {
+            val theme = audioContent.theme
+            if (theme?.id != null) {
+                val locale = langContext.lang.code
+                val translated = contentThemeTranslationRepository
+                    .findByContentThemeIdAndLocale(theme.id!!, locale)
+                val text = translated?.theme
+                if (!text.isNullOrBlank()) text else theme.theme
+            } else {
+                audioContent.theme!!.theme
+            }
+        }
+
         return GetAudioContentDetailResponse(
             contentId = audioContent.id!!,
             title = audioContent.title,
             detail = contentDetail,
+            languageCode = audioContent.languageCode,
             coverImageUrl = "$coverImageHost/${audioContent.coverImage!!}",
             contentUrl = audioContentUrl,
-            themeStr = audioContent.theme!!.theme,
+            themeStr = themeStrTranslated,
             tag = tag,
             price = audioContent.price,
             duration = audioContent.duration ?: "",
@@ -745,7 +891,8 @@ class AudioContentService(
             previousContent = previousContent,
             nextContent = nextContent,
             buyerList = buyerList,
-            isAvailableUsePoint = audioContent.isPointAvailable
+            isAvailableUsePoint = audioContent.isPointAvailable,
+            translated = translated
         )
     }
 
@@ -852,9 +999,27 @@ class AudioContentService(
                 it
             }
 
+        val contentIds = items.map { it.contentId }
+        val translatedContentList = if (contentIds.isNotEmpty()) {
+            val translations = contentTranslationRepository
+                .findByContentIdInAndLocale(contentIds = contentIds, locale = langContext.lang.code)
+                .associateBy { it.contentId }
+
+            items.map { item ->
+                val translatedTitle = translations[item.contentId]?.renderedPayload?.title
+                if (translatedTitle.isNullOrBlank()) {
+                    item
+                } else {
+                    item.copy(title = translatedTitle)
+                }
+            }
+        } else {
+            items
+        }
+
         return GetAudioContentListResponse(
             totalCount = totalCount,
-            items = items
+            items = translatedContentList
         )
     }
 
@@ -988,20 +1153,108 @@ class AudioContentService(
         contentType: ContentType,
         offset: Long = 0,
         limit: Long = 20,
+        sortType: SortType = SortType.NEWEST,
         isFree: Boolean = false,
         isAdult: Boolean = false,
         orderByRandom: Boolean = false,
         isPointAvailableOnly: Boolean = false
     ): List<AudioContentMainItem> {
-        return repository.getLatestContentByTheme(
+        /**
-            theme = theme,
+         * - AS-IS theme은 한글만 처리하도록 되어 있음
+         * - TO-BE 번역된 theme이 들어와도 동일한 동작을 하도록 처리
+         */
+        val normalizedTheme = normalizeThemeForQuery(
+            themes = theme,
+            contentType = contentType,
+            isFree = isFree,
+            isAdult = isAdult,
+            isPointAvailableOnly = isPointAvailableOnly
+        )
+
+        val contentList = repository.getLatestContentByTheme(
+            theme = normalizedTheme,
             contentType = contentType,
             offset = offset,
             limit = limit,
+            sortType = sortType,
             isFree = isFree,
             isAdult = isAdult,
             orderByRandom = orderByRandom,
             isPointAvailableOnly = isPointAvailableOnly
         )
+
+        val contentIds = contentList.map { it.contentId }
+        return if (contentIds.isNotEmpty()) {
+            val translations = contentTranslationRepository
+                .findByContentIdInAndLocale(contentIds = contentIds, locale = langContext.lang.code)
+                .associateBy { it.contentId }
+
+            contentList.map { item ->
+                val translatedTitle = translations[item.contentId]?.renderedPayload?.title
+                if (translatedTitle.isNullOrBlank()) {
+                    item
+                } else {
+                    item.copy(title = translatedTitle)
+                }
+            }
+        } else {
+            contentList
+        }
+    }
+
+    /**
+     * theme 파라미터로 번역된 테마명이 들어와도 한글 원문 테마로 조회되도록 정규화한다.
+     * - 현재 언어(locale)에 해당하는 테마 번역 목록을 활성 테마 집합과 매칭하여 역매핑한다.
+     * - 입력이 이미 한글인 경우 그대로 유지한다.
+     * - 매칭 실패 시 원본 값을 유지한다.
+     */
+    private fun normalizeThemeForQuery(
+        themes: List<String>,
+        contentType: ContentType,
+        isFree: Boolean,
+        isAdult: Boolean,
+        isPointAvailableOnly: Boolean
+    ): List<String> {
+        if (themes.isEmpty()) return themes
+
+        val themesWithIds = themeQueryRepository.getActiveThemeWithIdsOfContent(
+            isAdult = isAdult,
+            isFree = isFree,
+            isPointAvailableOnly = isPointAvailableOnly,
+            contentType = contentType
+        )
+
+        if (themesWithIds.isEmpty()) return themes
+
+        val idByKorean = themesWithIds.associate { it.theme to it.id }
+        val koreanById = themesWithIds.associate { it.id to it.theme }
+
+        val locale = langContext.lang.code
+        // 번역 테마를 역매핑하기 위해 현재 locale의 번역 목록을 조회
+        val translatedByTextToId = run {
+            val ids = themesWithIds.map { it.id }
+            if (ids.isEmpty()) {
+                emptyMap()
+            } else {
+                contentThemeTranslationRepository
+                    .findByContentThemeIdInAndLocale(ids, locale)
+                    .associate { it.theme to it.contentThemeId }
+            }
+        }
+
+        return themes.asSequence()
+            .map { input ->
+                when {
+                    idByKorean.containsKey(input) -> input // 이미 한글 원문
+                    translatedByTextToId.containsKey(input) -> {
+                        val id = translatedByTextToId[input]!!
+                        koreanById[id] ?: input
+                    }
+
+                    else -> input
+                }
+            }
+            .distinct()
+            .toList()
     }
 }

src/main/kotlin/kr/co/vividnext/sodalive/content/CreateAudioContentRequest.kt

@@ -17,5 +17,6 @@ data class CreateAudioContentRequest(
     val isCommentAvailable: Boolean = false,
     val isFullDetailVisible: Boolean = true,
     val previewStartTime: String? = null,
-    val previewEndTime: String? = null
+    val previewEndTime: String? = null,
+    val languageCode: String? = null
 )

src/main/kotlin/kr/co/vividnext/sodalive/content/GetAudioContentDetailResponse.kt

@@ -3,11 +3,13 @@ package kr.co.vividnext.sodalive.content
 import com.querydsl.core.annotations.QueryProjection
 import kr.co.vividnext.sodalive.content.comment.GetAudioContentCommentListItem
 import kr.co.vividnext.sodalive.content.order.OrderType
+import kr.co.vividnext.sodalive.content.translation.TranslatedContent
 
 data class GetAudioContentDetailResponse(
     val contentId: Long,
     val title: String,
     val detail: String,
+    val languageCode: String?,
     val coverImageUrl: String,
     val contentUrl: String,
     val themeStr: String,
@@ -39,7 +41,8 @@ data class GetAudioContentDetailResponse(
     val previousContent: OtherContentResponse?,
     val nextContent: OtherContentResponse?,
     val buyerList: List<ContentBuyer>,
-    val isAvailableUsePoint: Boolean
+    val isAvailableUsePoint: Boolean,
+    val translated: TranslatedContent?
 )
 
 data class OtherContentResponse @QueryProjection constructor(

src/main/kotlin/kr/co/vividnext/sodalive/content/LanguageDetectEvent.kt

@@ -0,0 +1,394 @@
+package kr.co.vividnext.sodalive.content
+
+import kr.co.vividnext.sodalive.chat.character.comment.CharacterCommentRepository
+import kr.co.vividnext.sodalive.chat.character.repository.ChatCharacterRepository
+import kr.co.vividnext.sodalive.chat.original.OriginalWorkRepository
+import kr.co.vividnext.sodalive.content.comment.AudioContentCommentRepository
+import kr.co.vividnext.sodalive.content.series.ContentSeriesRepository
+import kr.co.vividnext.sodalive.explorer.profile.CreatorCheersRepository
+import kr.co.vividnext.sodalive.i18n.translation.LanguageTranslationEvent
+import kr.co.vividnext.sodalive.i18n.translation.LanguageTranslationTargetType
+import org.slf4j.LoggerFactory
+import org.springframework.beans.factory.annotation.Value
+import org.springframework.context.ApplicationEventPublisher
+import org.springframework.data.repository.findByIdOrNull
+import org.springframework.http.HttpEntity
+import org.springframework.http.HttpHeaders
+import org.springframework.http.MediaType
+import org.springframework.scheduling.annotation.Async
+import org.springframework.stereotype.Component
+import org.springframework.transaction.annotation.Propagation
+import org.springframework.transaction.annotation.Transactional
+import org.springframework.transaction.event.TransactionPhase
+import org.springframework.transaction.event.TransactionalEventListener
+import org.springframework.util.LinkedMultiValueMap
+import org.springframework.web.client.RestTemplate
+
+/**
+ * 텍스트 기반 데이터(콘텐츠, 댓글 등)에 대해 파파고 언어 감지를 요청하기 위한 이벤트.
+ */
+enum class LanguageDetectTargetType {
+    CONTENT,
+    COMMENT,
+    CHARACTER,
+    CHARACTER_COMMENT,
+    CREATOR_CHEERS,
+    SERIES,
+    ORIGINAL_WORK
+}
+
+class LanguageDetectEvent(
+    val id: Long,
+    val query: String,
+    val targetType: LanguageDetectTargetType = LanguageDetectTargetType.CONTENT
+)
+
+data class PapagoLanguageDetectResponse(
+    val langCode: String?
+)
+
+@Component
+class LanguageDetectListener(
+    private val audioContentRepository: AudioContentRepository,
+    private val audioContentCommentRepository: AudioContentCommentRepository,
+    private val chatCharacterRepository: ChatCharacterRepository,
+    private val characterCommentRepository: CharacterCommentRepository,
+    private val creatorCheersRepository: CreatorCheersRepository,
+    private val seriesRepository: ContentSeriesRepository,
+    private val originalWorkRepository: OriginalWorkRepository,
+
+    private val applicationEventPublisher: ApplicationEventPublisher,
+
+    @Value("\${cloud.naver.papago-client-id}")
+    private val papagoClientId: String,
+
+    @Value("\${cloud.naver.papago-client-secret}")
+    private val papagoClientSecret: String
+) {
+
+    private val log = LoggerFactory.getLogger(LanguageDetectListener::class.java)
+
+    private val restTemplate: RestTemplate = RestTemplate()
+
+    private val papagoDetectUrl = "https://papago.apigw.ntruss.com/langs/v1/dect"
+
+    @Async
+    @TransactionalEventListener(phase = TransactionPhase.AFTER_COMMIT)
+    @Transactional(propagation = Propagation.REQUIRES_NEW)
+    fun detectLanguage(event: LanguageDetectEvent) {
+        if (event.query.isBlank()) {
+            log.debug("[PapagoLanguageDetect] query is blank. Skip language detection. event={}", event)
+            return
+        }
+
+        when (event.targetType) {
+            LanguageDetectTargetType.CONTENT -> handleContentLanguageDetect(event)
+            LanguageDetectTargetType.COMMENT -> handleCommentLanguageDetect(event)
+            LanguageDetectTargetType.CHARACTER -> handleCharacterLanguageDetect(event)
+            LanguageDetectTargetType.CHARACTER_COMMENT -> handleCharacterCommentLanguageDetect(event)
+            LanguageDetectTargetType.CREATOR_CHEERS -> handleCreatorCheersLanguageDetect(event)
+            LanguageDetectTargetType.SERIES -> handleSeriesLanguageDetect(event)
+            LanguageDetectTargetType.ORIGINAL_WORK -> handleOriginalWorkLanguageDetect(event)
+        }
+    }
+
+    private fun handleCharacterLanguageDetect(event: LanguageDetectEvent) {
+        val characterId = event.id
+
+        val character = chatCharacterRepository.findById(characterId).orElse(null)
+        if (character == null) {
+            log.warn("[PapagoLanguageDetect] ChatCharacter not found. characterId={}", characterId)
+            return
+        }
+
+        // 이미 언어 코드가 설정된 경우 호출하지 않음
+        if (!character.languageCode.isNullOrBlank()) {
+            log.debug(
+                "[PapagoLanguageDetect] languageCode already set. Skip language detection. characterId={}, languageCode={}",
+                characterId,
+                character.languageCode
+            )
+            return
+        }
+
+        val langCode = requestPapagoLanguageCode(event.query, characterId) ?: return
+
+        character.languageCode = langCode
+        chatCharacterRepository.save(character)
+
+        applicationEventPublisher.publishEvent(
+            LanguageTranslationEvent(
+                id = characterId,
+                targetType = LanguageTranslationTargetType.CHARACTER
+            )
+        )
+
+        log.info(
+            "[PapagoLanguageDetect] languageCode updated from Papago. characterId={}, langCode={}",
+            characterId,
+            langCode
+        )
+    }
+
+    private fun handleContentLanguageDetect(event: LanguageDetectEvent) {
+        val contentId = event.id
+
+        val audioContent = audioContentRepository.findById(contentId).orElse(null)
+        if (audioContent == null) {
+            log.warn("[PapagoLanguageDetect] AudioContent not found. contentId={}", contentId)
+            return
+        }
+
+        // 이미 언어 코드가 설정된 경우 호출하지 않음
+        if (!audioContent.languageCode.isNullOrBlank()) {
+            log.debug(
+                "[PapagoLanguageDetect] languageCode already set. Skip language detection. contentId={}, languageCode={}",
+                contentId,
+                audioContent.languageCode
+            )
+            return
+        }
+
+        val langCode = requestPapagoLanguageCode(event.query, contentId) ?: return
+
+        audioContent.languageCode = langCode
+
+        // REQUIRES_NEW 트랜잭션 내에서 변경 내용을 저장한다.
+        audioContentRepository.save(audioContent)
+
+        applicationEventPublisher.publishEvent(
+            LanguageTranslationEvent(
+                id = contentId,
+                targetType = LanguageTranslationTargetType.CONTENT
+            )
+        )
+
+        log.info(
+            "[PapagoLanguageDetect] languageCode updated from Papago. contentId={}, langCode={}",
+            contentId,
+            langCode
+        )
+    }
+
+    private fun handleCommentLanguageDetect(event: LanguageDetectEvent) {
+        val commentId = event.id
+
+        val comment = audioContentCommentRepository.findById(commentId).orElse(null)
+        if (comment == null) {
+            log.warn("[PapagoLanguageDetect] AudioContentComment not found. commentId={}", commentId)
+            return
+        }
+
+        // 이미 언어 코드가 설정된 경우 호출하지 않음
+        if (!comment.languageCode.isNullOrBlank()) {
+            log.debug(
+                "[PapagoLanguageDetect] languageCode already set. Skip language detection. commentId={}, languageCode={}",
+                commentId,
+                comment.languageCode
+            )
+            return
+        }
+
+        val langCode = requestPapagoLanguageCode(event.query, commentId) ?: return
+
+        comment.languageCode = langCode
+        audioContentCommentRepository.save(comment)
+
+        log.info(
+            "[PapagoLanguageDetect] languageCode updated from Papago. commentId={}, langCode={}",
+            commentId,
+            langCode
+        )
+    }
+
+    private fun handleCharacterCommentLanguageDetect(event: LanguageDetectEvent) {
+        val commentId = event.id
+
+        val comment = characterCommentRepository.findById(commentId).orElse(null)
+        if (comment == null) {
+            log.warn("[PapagoLanguageDetect] CharacterComment not found. commentId={}", commentId)
+            return
+        }
+
+        // 이미 언어 코드가 설정된 경우 호출하지 않음
+        if (!comment.languageCode.isNullOrBlank()) {
+            log.debug(
+                "[PapagoLanguageDetect] languageCode already set. Skip language detection. " +
+                    "characterCommentId={}, languageCode={}",
+                commentId,
+                comment.languageCode
+            )
+            return
+        }
+
+        val langCode = requestPapagoLanguageCode(event.query, commentId) ?: return
+
+        comment.languageCode = langCode
+        characterCommentRepository.save(comment)
+
+        log.info(
+            "[PapagoLanguageDetect] languageCode updated from Papago. characterCommentId={}, langCode={}",
+            commentId,
+            langCode
+        )
+    }
+
+    private fun handleCreatorCheersLanguageDetect(event: LanguageDetectEvent) {
+        val cheersId = event.id
+
+        val cheers = creatorCheersRepository.findById(cheersId).orElse(null)
+        if (cheers == null) {
+            log.warn("[PapagoLanguageDetect] CreatorCheers not found. cheersId={}", cheersId)
+            return
+        }
+
+        // 이미 언어 코드가 설정된 경우 호출하지 않음
+        if (!cheers.languageCode.isNullOrBlank()) {
+            log.debug(
+                "[PapagoLanguageDetect] languageCode already set. Skip language detection. cheersId={}, languageCode={}",
+                cheersId,
+                cheers.languageCode
+            )
+            return
+        }
+
+        val langCode = requestPapagoLanguageCode(event.query, cheersId) ?: return
+
+        cheers.languageCode = langCode
+        creatorCheersRepository.save(cheers)
+
+        log.info(
+            "[PapagoLanguageDetect] languageCode updated from Papago. cheersId={}, langCode={}",
+            cheersId,
+            langCode
+        )
+    }
+
+    private fun handleSeriesLanguageDetect(event: LanguageDetectEvent) {
+        val seriesId = event.id
+
+        val series = seriesRepository.findByIdOrNull(seriesId)
+        if (series == null) {
+            log.warn("[PapagoLanguageDetect] Series not found. seriesId={}", seriesId)
+            return
+        }
+
+        // 이미 언어 코드가 설정된 경우 호출하지 않음
+        if (!series.languageCode.isNullOrBlank()) {
+            log.debug(
+                "[PapagoLanguageDetect] languageCode already set. Skip language detection. seriesId={}, languageCode={}",
+                seriesId,
+                series.languageCode
+            )
+            return
+        }
+
+        val langCode = requestPapagoLanguageCode(event.query, seriesId) ?: return
+
+        series.languageCode = langCode
+        seriesRepository.save(series)
+
+        applicationEventPublisher.publishEvent(
+            LanguageTranslationEvent(
+                id = seriesId,
+                targetType = LanguageTranslationTargetType.SERIES
+            )
+        )
+
+        log.info(
+            "[PapagoLanguageDetect] languageCode updated from Papago. seriesId={}, langCode={}",
+            seriesId,
+            langCode
+        )
+    }
+
+    private fun handleOriginalWorkLanguageDetect(event: LanguageDetectEvent) {
+        val originalWorkId = event.id
+
+        val originalWork = originalWorkRepository.findByIdOrNull(originalWorkId)
+        if (originalWork == null) {
+            log.warn("[PapagoLanguageDetect] OriginalWork not found. originalWorkId={}", originalWorkId)
+            return
+        }
+
+        // 이미 언어 코드가 설정된 경우 호출하지 않음
+        if (!originalWork.languageCode.isNullOrBlank()) {
+            log.debug(
+                "[PapagoLanguageDetect] languageCode already set. Skip language detection. originalWorkId={}, languageCode={}",
+                originalWorkId,
+                originalWork.languageCode
+            )
+            return
+        }
+
+        val langCode = requestPapagoLanguageCode(event.query, originalWorkId) ?: return
+
+        originalWork.languageCode = langCode
+        originalWorkRepository.save(originalWork)
+
+        // 언어 감지가 완료된 후 언어 번역 이벤트 호출
+        applicationEventPublisher.publishEvent(
+            LanguageTranslationEvent(
+                id = originalWorkId,
+                targetType = LanguageTranslationTargetType.ORIGINAL_WORK
+            )
+        )
+
+        log.info(
+            "[PapagoLanguageDetect] languageCode updated from Papago. originalWorkId={}, langCode={}",
+            originalWorkId,
+            langCode
+        )
+    }
+
+    private fun requestPapagoLanguageCode(query: String, targetIdForLog: Long): String? {
+        return try {
+            val headers = HttpHeaders().apply {
+                contentType = MediaType.APPLICATION_FORM_URLENCODED
+                set("X-NCP-APIGW-API-KEY-ID", papagoClientId)
+                set("X-NCP-APIGW-API-KEY", papagoClientSecret)
+            }
+
+            val body = LinkedMultiValueMap<String, String>().apply {
+                // 파파고 스펙에 따라 query 파라미터에 텍스트를 공백으로 구분하여 전달
+                add("query", query)
+            }
+
+            val requestEntity = HttpEntity(body, headers)
+
+            val response = restTemplate.postForEntity(
+                papagoDetectUrl,
+                requestEntity,
+                PapagoLanguageDetectResponse::class.java
+            )
+
+            if (!response.statusCode.is2xxSuccessful) {
+                log.warn(
+                    "[PapagoLanguageDetect] Non-success status from Papago. status={}, targetId={}",
+                    response.statusCode,
+                    targetIdForLog
+                )
+                return null
+            }
+
+            val langCode = response.body?.langCode?.takeIf { it.isNotBlank() }
+            if (langCode == null) {
+                log.warn(
+                    "[PapagoLanguageDetect] langCode is null or blank in Papago response. targetId={}",
+                    targetIdForLog
+                )
+                return null
+            }
+
+            langCode
+        } catch (ex: Exception) {
+            // 언어 감지는 부가 기능이므로, 실패 시 예외를 전파하지 않고 로그만 남긴다.
+            log.error(
+                "[PapagoLanguageDetect] Failed to detect language via Papago. targetId={}",
+                targetIdForLog,
+                ex
+            )
+            null
+        }
+    }
+}

src/main/kotlin/kr/co/vividnext/sodalive/content/comment/AudioContentComment.kt

@@ -16,6 +16,7 @@ import javax.persistence.Table
 data class AudioContentComment(
     @Column(columnDefinition = "TEXT", nullable = false)
     var comment: String,
+    var languageCode: String?,
     @Column(nullable = true)
     var donationCan: Int? = null,
     val isSecret: Boolean = false,

src/main/kotlin/kr/co/vividnext/sodalive/content/comment/AudioContentCommentController.kt

@@ -32,7 +32,8 @@ class AudioContentCommentController(
             audioContentId = request.contentId,
             parentId = request.parentId,
             isSecret = request.isSecret,
-            member = member
+            member = member,
+            languageCode = request.languageCode
         )
 
         try {

src/main/kotlin/kr/co/vividnext/sodalive/content/comment/AudioContentCommentRepository.kt

@@ -85,6 +85,7 @@ class AudioContentCommentQueryRepositoryImpl(
                     audioContentComment.member.nickname,
                     audioContentComment.member.profileImage.prepend("/").prepend(cloudFrontHost),
                     audioContentComment.comment,
+                    audioContentComment.languageCode,
                     audioContentComment.isSecret,
                     audioContentComment.donationCan.coalesce(0),
                     formattedDate,
@@ -166,6 +167,7 @@ class AudioContentCommentQueryRepositoryImpl(
                     audioContentComment.member.nickname,
                     audioContentComment.member.profileImage.prepend("/").prepend(cloudFrontHost),
                     audioContentComment.comment,
+                    audioContentComment.languageCode,
                     audioContentComment.isSecret,
                     audioContentComment.donationCan.coalesce(0),
                     formattedDate,

src/main/kotlin/kr/co/vividnext/sodalive/content/comment/AudioContentCommentService.kt

@@ -2,6 +2,8 @@ package kr.co.vividnext.sodalive.content.comment
 
 import kr.co.vividnext.sodalive.common.SodaException
 import kr.co.vividnext.sodalive.content.AudioContentRepository
+import kr.co.vividnext.sodalive.content.LanguageDetectEvent
+import kr.co.vividnext.sodalive.content.LanguageDetectTargetType
 import kr.co.vividnext.sodalive.content.order.OrderRepository
 import kr.co.vividnext.sodalive.fcm.FcmEvent
 import kr.co.vividnext.sodalive.fcm.FcmEventType
@@ -32,7 +34,8 @@ class AudioContentCommentService(
         comment: String,
         audioContentId: Long,
         parentId: Long? = null,
-        isSecret: Boolean = false
+        isSecret: Boolean = false,
+        languageCode: String?
     ): Long {
         val audioContent = audioContentRepository.findByIdOrNull(id = audioContentId)
             ?: throw SodaException("잘못된 콘텐츠 입니다.\n다시 시도해 주세요.")
@@ -50,7 +53,7 @@ class AudioContentCommentService(
             throw SodaException("콘텐츠 구매 후 비밀댓글을 등록할 수 있습니다.")
         }
 
-        val audioContentComment = AudioContentComment(comment = comment, isSecret = isSecret)
+        val audioContentComment = AudioContentComment(comment = comment, languageCode = languageCode, isSecret = isSecret)
         audioContentComment.audioContent = audioContent
         audioContentComment.member = member
 
@@ -85,6 +88,17 @@ class AudioContentCommentService(
             )
         )
 
+        // 언어 코드가 지정되지 않은 경우, 파파고 언어 감지 API를 통해 비동기로 언어를 식별한다.
+        if (languageCode.isNullOrBlank()) {
+            applicationEventPublisher.publishEvent(
+                LanguageDetectEvent(
+                    id = savedContentComment.id!!,
+                    query = comment,
+                    targetType = LanguageDetectTargetType.COMMENT
+                )
+            )
+        }
+
         return savedContentComment.id!!
     }
 

src/main/kotlin/kr/co/vividnext/sodalive/content/comment/GetAudioContentCommentListResponse.kt

@@ -13,6 +13,7 @@ data class GetAudioContentCommentListItem @QueryProjection constructor(
     val nickname: String,
     val profileUrl: String,
     val comment: String,
+    val languageCode: String?,
     val isSecret: Boolean,
     val donationCan: Int,
     val date: String,

src/main/kotlin/kr/co/vividnext/sodalive/content/comment/RegisterCommentRequest.kt

@@ -4,5 +4,6 @@ data class RegisterCommentRequest(
     val comment: String,
     val contentId: Long,
     val parentId: Long?,
-    val isSecret: Boolean = false
+    val isSecret: Boolean = false,
+    val languageCode: String? = null
 )

src/main/kotlin/kr/co/vividnext/sodalive/content/donation/AudioContentDonationRequest.kt

@@ -4,5 +4,6 @@ data class AudioContentDonationRequest(
     val contentId: Long,
     val donationCan: Int,
     val comment: String,
-    val container: String
+    val container: String,
+    val languageCode: String? = null
 )

src/main/kotlin/kr/co/vividnext/sodalive/content/donation/AudioContentDonationService.kt

@@ -4,9 +4,12 @@ import kr.co.vividnext.sodalive.can.payment.CanPaymentService
 import kr.co.vividnext.sodalive.can.use.CanUsage
 import kr.co.vividnext.sodalive.common.SodaException
 import kr.co.vividnext.sodalive.content.AudioContentRepository
+import kr.co.vividnext.sodalive.content.LanguageDetectEvent
+import kr.co.vividnext.sodalive.content.LanguageDetectTargetType
 import kr.co.vividnext.sodalive.content.comment.AudioContentComment
 import kr.co.vividnext.sodalive.content.comment.AudioContentCommentRepository
 import kr.co.vividnext.sodalive.member.Member
+import org.springframework.context.ApplicationEventPublisher
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
 
@@ -14,7 +17,8 @@ import org.springframework.transaction.annotation.Transactional
 class AudioContentDonationService(
     private val canPaymentService: CanPaymentService,
     private val queryRepository: AudioContentRepository,
-    private val commentRepository: AudioContentCommentRepository
+    private val commentRepository: AudioContentCommentRepository,
+    private val applicationEventPublisher: ApplicationEventPublisher
 ) {
     @Transactional
     fun donation(request: AudioContentDonationRequest, member: Member) {
@@ -34,10 +38,23 @@ class AudioContentDonationService(
 
         val audioContentComment = AudioContentComment(
             comment = request.comment,
+            languageCode = request.languageCode,
             donationCan = request.donationCan
         )
         audioContentComment.audioContent = audioContent
         audioContentComment.member = member
-        commentRepository.save(audioContentComment)
+
+        val savedComment = commentRepository.save(audioContentComment)
+
+        // 언어 코드가 지정되지 않은 경우, 파파고 언어 감지 API를 통해 비동기로 언어를 식별한다.
+        if (request.languageCode.isNullOrBlank()) {
+            applicationEventPublisher.publishEvent(
+                LanguageDetectEvent(
+                    id = savedComment.id!!,
+                    query = request.comment,
+                    targetType = LanguageDetectTargetType.COMMENT
+                )
+            )
+        }
     }
 }

src/main/kotlin/kr/co/vividnext/sodalive/content/main/AudioContentMainService.kt

@@ -6,7 +6,11 @@ import kr.co.vividnext.sodalive.content.main.banner.AudioContentBannerType
 import kr.co.vividnext.sodalive.content.main.banner.GetAudioContentBannerResponse
 import kr.co.vividnext.sodalive.content.main.curation.GetAudioContentCurationResponse
 import kr.co.vividnext.sodalive.content.theme.AudioContentThemeQueryRepository
+import kr.co.vividnext.sodalive.content.theme.AudioContentThemeService
+import kr.co.vividnext.sodalive.content.theme.translation.ContentThemeTranslationRepository
+import kr.co.vividnext.sodalive.content.translation.ContentTranslationRepository
 import kr.co.vividnext.sodalive.event.EventItem
+import kr.co.vividnext.sodalive.i18n.LangContext
 import kr.co.vividnext.sodalive.member.Member
 import kr.co.vividnext.sodalive.member.block.BlockMemberRepository
 import org.springframework.beans.factory.annotation.Value
@@ -20,14 +24,33 @@ class AudioContentMainService(
     private val repository: AudioContentRepository,
     private val blockMemberRepository: BlockMemberRepository,
     private val audioContentThemeRepository: AudioContentThemeQueryRepository,
+    private val audioContentThemeService: AudioContentThemeService,
+
+    private val contentThemeTranslationRepository: ContentThemeTranslationRepository,
+
+    private val contentTranslationRepository: ContentTranslationRepository,
+
+    private val langContext: LangContext,
 
     @Value("\${cloud.aws.cloud-front.host}")
     private val imageHost: String
 ) {
     @Transactional(readOnly = true)
-    @Cacheable(cacheNames = ["default"], key = "'themeList:' + ':' + #isAdult")
     fun getThemeList(isAdult: Boolean, contentType: ContentType): List<String> {
-        return audioContentThemeRepository.getActiveThemeOfContent(isAdult = isAdult, contentType = contentType)
+        /**
+         * 콘텐츠 테마 조회
+         *
+         * - langContext에 따라 기본 한국어 데이터 혹은 번역된 콘텐츠 테마를 조회해야 함
+         *
+         * - 번역된 테마 데이터가 없다면 번역하여 반환
+         * - 번역된 데이터가 있다면 번역된 데이터를 조회하여 반환
+         */
+        // 표시용 테마 목록은 언어 컨텍스트에 따라 번역된 값을 반환해야 한다.
+        // AudioContentThemeService가 번역/저장을 처리하므로 이를 사용한다.
+        return audioContentThemeService.getActiveThemeOfContent(
+            isAdult = isAdult,
+            contentType = contentType
+        )
     }
 
     @Transactional(readOnly = true)
@@ -60,8 +83,12 @@ class AudioContentMainService(
         member: Member,
         pageable: Pageable
     ): GetNewContentAllResponse {
+        /**
+         * - AS-IS theme은 한글만 처리하도록 되어 있음
+         * - TO-BE 번역된 theme이 들어와도 동일한 동작을 하도록 처리
+         */
         val isAdult = member.auth != null && isAdultContentVisible
-        val themeList = if (theme.isBlank()) {
+        val themeListRaw = if (theme.isBlank()) {
             audioContentThemeRepository.getActiveThemeOfContent(
                 isAdult = isAdult,
                 contentType = contentType
@@ -70,13 +97,19 @@ class AudioContentMainService(
             listOf(theme)
         }
 
+        val themeList = normalizeThemeForQuery(
+            themes = themeListRaw,
+            contentType = contentType,
+            isAdult = isAdult
+        )
+
         val totalCount = repository.totalCountNewContentFor2Weeks(
             themeList,
             memberId = member.id!!,
             isAdult = isAdult,
             contentType = contentType
         )
-        val items = repository.findByThemeFor2Weeks(
+        val contentList = repository.findByThemeFor2Weeks(
             cloudfrontHost = imageHost,
             memberId = member.id!!,
             theme = themeList,
@@ -87,7 +120,75 @@ class AudioContentMainService(
         )
             .filter { !blockMemberRepository.isBlocked(blockedMemberId = member.id!!, memberId = it.creatorId) }
 
-        return GetNewContentAllResponse(totalCount, items)
+        val contentIds = contentList.map { it.contentId }
+        val translatedContentList = if (contentIds.isNotEmpty()) {
+            val translations = contentTranslationRepository
+                .findByContentIdInAndLocale(contentIds = contentIds, locale = langContext.lang.code)
+                .associateBy { it.contentId }
+
+            contentList.map { item ->
+                val translatedTitle = translations[item.contentId]?.renderedPayload?.title
+                if (translatedTitle.isNullOrBlank()) {
+                    item
+                } else {
+                    item.copy(title = translatedTitle)
+                }
+            }
+        } else {
+            contentList
+        }
+
+        return GetNewContentAllResponse(totalCount, translatedContentList)
+    }
+
+    /**
+     * 번역된 테마명이 들어와도 한글 원문 테마로 조회되도록 정규화한다.
+     */
+    private fun normalizeThemeForQuery(
+        themes: List<String>,
+        contentType: ContentType,
+        isAdult: Boolean
+    ): List<String> {
+        if (themes.isEmpty()) return themes
+
+        val themesWithIds = audioContentThemeRepository.getActiveThemeWithIdsOfContent(
+            isAdult = isAdult,
+            isFree = false,
+            isPointAvailableOnly = false,
+            contentType = contentType
+        )
+
+        if (themesWithIds.isEmpty()) return themes
+
+        val idByKorean = themesWithIds.associate { it.theme to it.id }
+        val koreanById = themesWithIds.associate { it.id to it.theme }
+
+        val locale = langContext.lang.code
+        val translatedByTextToId = run {
+            val ids = themesWithIds.map { it.id }
+            if (ids.isEmpty()) {
+                emptyMap()
+            } else {
+                contentThemeTranslationRepository
+                    .findByContentThemeIdInAndLocale(ids, locale)
+                    .associate { it.theme to it.contentThemeId }
+            }
+        }
+
+        return themes.asSequence()
+            .map { input ->
+                when {
+                    idByKorean.containsKey(input) -> input
+                    translatedByTextToId.containsKey(input) -> {
+                        val id = translatedByTextToId[input]!!
+                        koreanById[id] ?: input
+                    }
+
+                    else -> input
+                }
+            }
+            .distinct()
+            .toList()
     }
 
     @Transactional(readOnly = true)

src/main/kotlin/kr/co/vividnext/sodalive/content/main/curation/AudioContentCurationQueryRepository.kt

@@ -58,6 +58,7 @@ class AudioContentCurationQueryRepository(private val queryFactory: JPAQueryFact
             SortType.NEWEST -> audioContent.createdAt.desc()
             SortType.PRICE_HIGH -> audioContent.price.desc()
             SortType.PRICE_LOW -> audioContent.price.asc()
+            SortType.POPULARITY -> audioContent.playCount.desc()
         }
 
         var where = audioContent.isActive.isTrue

src/main/kotlin/kr/co/vividnext/sodalive/content/series/ContentSeriesService.kt

@@ -6,15 +6,26 @@ import kr.co.vividnext.sodalive.content.order.OrderRepository
 import kr.co.vividnext.sodalive.content.order.OrderType
 import kr.co.vividnext.sodalive.content.series.content.ContentSeriesContentRepository
 import kr.co.vividnext.sodalive.content.series.content.GetSeriesContentListResponse
+import kr.co.vividnext.sodalive.content.series.translation.SeriesGenreTranslationRepository
+import kr.co.vividnext.sodalive.content.series.translation.SeriesTranslation
+import kr.co.vividnext.sodalive.content.series.translation.SeriesTranslationPayload
+import kr.co.vividnext.sodalive.content.series.translation.SeriesTranslationRepository
+import kr.co.vividnext.sodalive.content.series.translation.TranslatedSeries
+import kr.co.vividnext.sodalive.content.translation.ContentTranslationRepository
 import kr.co.vividnext.sodalive.creator.admin.content.series.Series
 import kr.co.vividnext.sodalive.creator.admin.content.series.SeriesPublishedDaysOfWeek
 import kr.co.vividnext.sodalive.creator.admin.content.series.SeriesSortType
 import kr.co.vividnext.sodalive.creator.admin.content.series.SeriesState
 import kr.co.vividnext.sodalive.explorer.ExplorerQueryRepository
+import kr.co.vividnext.sodalive.i18n.Lang
+import kr.co.vividnext.sodalive.i18n.LangContext
+import kr.co.vividnext.sodalive.i18n.translation.PapagoTranslationService
+import kr.co.vividnext.sodalive.i18n.translation.TranslateRequest
 import kr.co.vividnext.sodalive.member.Member
 import kr.co.vividnext.sodalive.member.block.BlockMemberRepository
 import org.springframework.beans.factory.annotation.Value
 import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
 import java.time.LocalDateTime
 import java.time.ZoneId
 import java.time.format.DateTimeFormatter
@@ -27,6 +38,13 @@ class ContentSeriesService(
     private val explorerQueryRepository: ExplorerQueryRepository,
     private val seriesContentRepository: ContentSeriesContentRepository,
 
+    private val langContext: LangContext,
+
+    private val seriesTranslationRepository: SeriesTranslationRepository,
+    private val seriesGenreTranslationRepository: SeriesGenreTranslationRepository,
+    private val contentTranslationRepository: ContentTranslationRepository,
+    private val translationService: PapagoTranslationService,
+
     @Value("\${cloud.aws.cloud-front.host}")
     private val coverImageHost: String
 ) {
@@ -42,11 +60,77 @@ class ContentSeriesService(
         limit: Long = 20
     ): List<GetSeriesListResponse.SeriesListItem> {
         val originalAudioDramaList = repository.getOriginalAudioDramaList(isAdult, contentType, orderByRandom, offset, limit)
-        return seriesToSeriesListItem(originalAudioDramaList, isAdult, contentType)
+        return getTranslatedSeriesList(seriesToSeriesListItem(originalAudioDramaList, isAdult, contentType))
     }
 
     fun getGenreList(memberId: Long, isAdult: Boolean, contentType: ContentType): List<GetSeriesGenreListResponse> {
-        return repository.getGenreList(memberId = memberId, isAdult = isAdult, contentType = contentType)
+        /**
+         * langContext.lang == Lang.EN || Lang.JA 일 때 번역된 콘텐츠 테마 반환
+         * 번역이 없으면 번역 API 호출 후 저장하고 반환
+         */
+        val genres = repository.getGenreList(memberId = memberId, isAdult = isAdult, contentType = contentType)
+
+        val currentLang = langContext.lang
+        if (currentLang == Lang.EN || currentLang == Lang.JA) {
+            val targetLocale = currentLang.code
+            val ids = genres.map { it.id }
+
+            // 기존 번역 일괄 조회
+            val existing = if (ids.isNotEmpty()) {
+                // 메서드가 없을 경우 개별 조회로 대체되지만, 성능을 위해 우선 시도
+                try {
+                    seriesGenreTranslationRepository
+                        .findBySeriesGenreIdInAndLocale(ids, targetLocale)
+                } catch (_: Exception) {
+                    // Spring Data 메서드 미존재 시 안전하게 개별 조회로 폴백
+                    ids.mapNotNull { id ->
+                        seriesGenreTranslationRepository.findBySeriesGenreIdAndLocale(id, targetLocale)
+                    }
+                }
+            } else {
+                emptyList()
+            }
+
+            val existingMap = existing.associateBy { it.seriesGenreId }.toMutableMap()
+
+            // 미번역 항목 수집
+            val untranslated = genres.filter { existingMap[it.id] == null }
+            if (untranslated.isNotEmpty()) {
+                val texts = untranslated.map { it.genre }
+                val response = translationService.translate(
+                    request = TranslateRequest(
+                        texts = texts,
+                        sourceLanguage = "ko",
+                        targetLanguage = targetLocale
+                    )
+                )
+
+                val translatedTexts = response.translatedText
+                val toSave = mutableListOf<kr.co.vividnext.sodalive.content.series.translation.SeriesGenreTranslation>()
+                untranslated.forEachIndexed { index, item ->
+                    val translated = translatedTexts.getOrNull(index) ?: item.genre
+                    toSave.add(
+                        kr.co.vividnext.sodalive.content.series.translation.SeriesGenreTranslation(
+                            seriesGenreId = item.id,
+                            locale = targetLocale,
+                            genre = translated
+                        )
+                    )
+                }
+                if (toSave.isNotEmpty()) {
+                    seriesGenreTranslationRepository.saveAll(toSave)
+                    toSave.forEach { saved -> existingMap[saved.seriesGenreId] = saved }
+                }
+            }
+
+            // 원래 순서 보존하여 결과 조립
+            return genres.map { g ->
+                val translated = existingMap[g.id]?.genre ?: g.genre
+                GetSeriesGenreListResponse(id = g.id, genre = translated)
+            }
+        }
+
+        return genres
     }
 
     fun getSeriesList(
@@ -83,7 +167,7 @@ class ContentSeriesService(
         ).filter { !blockMemberRepository.isBlocked(blockedMemberId = member.id!!, memberId = it.member!!.id!!) }
 
         val items = seriesToSeriesListItem(seriesList = rawItems, isAdult = isAuth, contentType = contentType)
-        return GetSeriesListResponse(totalCount, items)
+        return GetSeriesListResponse(totalCount, getTranslatedSeriesList(items))
     }
 
     fun getSeriesListByGenre(
@@ -112,9 +196,10 @@ class ContentSeriesService(
         ).filter { !blockMemberRepository.isBlocked(blockedMemberId = member.id!!, memberId = it.member!!.id!!) }
 
         val items = seriesToSeriesListItem(seriesList = rawItems, isAdult = isAuth, contentType = contentType)
-        return GetSeriesListResponse(totalCount, items)
+        return GetSeriesListResponse(totalCount, getTranslatedSeriesList(items))
     }
 
+    @Transactional
     fun getSeriesDetail(
         seriesId: Long,
         isAdultContentVisible: Boolean,
@@ -156,7 +241,115 @@ class ContentSeriesService(
             limit = 5
         )
 
+        /**
+         * series.languageCode != null && series.languageCode != languageCode
+         *
+         * 번역 시리즈를 조회한다. - series, locale
+         * 번역 콘텐츠가 있으면
+         * TranslatedSeries로 가공한다
+         *
+         * 번역 콘텐츠가 없으면
+         * 파파고 API를 통해 번역한 후 저장한다.
+         *
+         * 번역 대상: title, introduction, keywordList
+         *
+         * 파파고로 번역한 데이터를 TranslatedSeries 가공한다
+         */
+
         val dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy.MM.dd")
+
+        // 요청된 언어(locale)에 대한 시리즈 번역을 조회하거나, 없으면 동기 번역 후 저장한다.
+        var translated: TranslatedSeries? = null
+        run {
+            val locale = langContext.lang.code
+            val languageCode = series.languageCode
+            // 원본 언어가 존재하고, 요청 언어와 다를 때만 번역 처리
+            if (!languageCode.isNullOrBlank() && languageCode != locale) {
+                val existing = seriesTranslationRepository.findBySeriesIdAndLocale(seriesId = seriesId, locale = locale)
+                if (existing != null) {
+                    val payload = existing.renderedPayload
+                    val kws = payload.keywords.ifEmpty { keywordList }
+                    translated = TranslatedSeries(
+                        title = payload.title,
+                        introduction = payload.introduction,
+                        keywords = kws
+                    )
+                } else {
+                    val texts = mutableListOf<String>()
+                    texts.add(series.title)
+                    texts.add(series.introduction)
+                    // 키워드는 개별 항목으로 번역 요청하여 N회 호출을 방지한다.
+                    val keywordListForTranslate = keywordList
+                    texts.addAll(keywordListForTranslate)
+
+                    val response = translationService.translate(
+                        request = TranslateRequest(
+                            texts = texts,
+                            sourceLanguage = languageCode,
+                            targetLanguage = locale
+                        )
+                    )
+
+                    val translatedTexts = response.translatedText
+                    if (translatedTexts.size == texts.size) {
+                        var index = 0
+                        val translatedTitle = translatedTexts[index++]
+                        val translatedIntroduction = translatedTexts[index++]
+                        val translatedKeywords = if (keywordListForTranslate.isNotEmpty()) {
+                            translatedTexts.subList(index, translatedTexts.size)
+                        } else {
+                            // 번역할 키워드가 없으면 원본 키워드 반환 정책 적용
+                            keywordList
+                        }
+
+                        val payload = SeriesTranslationPayload(
+                            title = translatedTitle,
+                            introduction = translatedIntroduction,
+                            keywords = translatedKeywords
+                        )
+
+                        seriesTranslationRepository.save(
+                            SeriesTranslation(
+                                seriesId = seriesId,
+                                locale = locale,
+                                renderedPayload = payload
+                            )
+                        )
+
+                        val kws = translatedKeywords.ifEmpty { keywordList }
+                        translated = TranslatedSeries(
+                            title = translatedTitle,
+                            introduction = translatedIntroduction,
+                            keywords = kws
+                        )
+                    }
+                }
+            }
+        }
+
+        // 장르 번역 조회 (있으면 반환)
+        val translatedGenre: String? = run {
+            val genreId = series.genre?.id
+            if (genreId != null) {
+                val locale = langContext.lang.code
+                val found = seriesGenreTranslationRepository.findBySeriesGenreIdAndLocale(genreId, locale)
+                val text = found?.genre
+                if (!text.isNullOrBlank()) {
+                    text
+                } else {
+                    null
+                }
+            } else {
+                null
+            }
+        }
+
+        // publishedDateUtc는 ISO8601(Z 포함)로 반환
+        val publishedDateUtc = series.createdAt!!
+            .atZone(ZoneId.of("UTC"))
+            .toInstant()
+            .toString()
+
         return GetSeriesDetailResponse(
             seriesId = seriesId,
             title = series.title,
@@ -171,6 +364,7 @@ class ContentSeriesService(
                 .withZoneSameInstant(ZoneId.of("Asia/Seoul"))
                 .toLocalDateTime()
                 .format(dateTimeFormatter),
+            publishedDateUtc = publishedDateUtc,
             creator = GetSeriesDetailResponse.GetSeriesDetailCreator(
                 creatorId = series.member!!.id!!,
                 nickname = series.member!!.nickname,
@@ -186,7 +380,9 @@ class ContentSeriesService(
             keywordList = keywordList,
             publishedDaysOfWeek = publishedDaysOfWeekText(series.publishedDaysOfWeek),
             contentList = seriesContentList.items,
-            contentCount = seriesContentList.totalCount
+            contentCount = seriesContentList.totalCount,
+            translated = translated,
+            translatedGenre = translatedGenre
         )
     }
 
@@ -228,7 +424,33 @@ class ContentSeriesService(
                 it
             }
 
-        return GetSeriesContentListResponse(totalCount, contentList)
+        /**
+         * 콘텐츠 리스트의 제목을 현재 언어(locale)에 맞춰 일괄 번역한다.
+         *
+         * 처리 절차:
+         * - 입력된 콘텐츠들의 contentId 집합을 만들고, 요청 언어 코드(langContext.lang.code)로
+         *   contentTranslationRepository에서 번역 데이터를 한 번에 조회한다.
+         * - 각 항목에 대해 번역된 제목이 존재하고 비어있지 않으면 title만 번역 값으로 교체한다.
+         * - 번역이 없거나 공백이면 원본 항목을 그대로 반환한다.
+         *
+         * 성능:
+         * - N건의 항목을 1회의 조회로 해결하기 위해 IN 쿼리를 사용한다.
+         */
+        val contentIds = contentList.map { it.contentId }
+        val translatedItems = if (contentIds.isNotEmpty()) {
+            val translations = contentTranslationRepository
+                .findByContentIdInAndLocale(contentIds = contentIds, locale = langContext.lang.code)
+                .associateBy { it.contentId }
+
+            contentList.map { item ->
+                val translatedTitle = translations[item.contentId]?.renderedPayload?.title
+                if (translatedTitle.isNullOrBlank()) item else item.copy(title = translatedTitle)
+            }
+        } else {
+            contentList
+        }
+
+        return GetSeriesContentListResponse(totalCount, translatedItems)
     }
 
     fun getRecommendSeriesList(
@@ -243,7 +465,13 @@ class ContentSeriesService(
             limit = 20
         ).filter { !blockMemberRepository.isBlocked(blockedMemberId = member.id!!, memberId = it.member!!.id!!) }
 
-        return seriesToSeriesListItem(seriesList = seriesList, isAdult = isAuth, contentType = contentType)
+        return getTranslatedSeriesList(
+            seriesToSeriesListItem(
+                seriesList = seriesList,
+                isAdult = isAuth,
+                contentType = contentType
+            )
+        )
     }
 
     fun fetchSeriesByCurationId(
@@ -258,7 +486,7 @@ class ContentSeriesService(
             isAdult = isAdult,
             contentType = contentType
         )
-        return seriesToSeriesListItem(seriesList, isAdult, contentType)
+        return getTranslatedSeriesList(seriesToSeriesListItem(seriesList, isAdult, contentType))
     }
 
     fun getDayOfWeekSeriesList(
@@ -288,7 +516,7 @@ class ContentSeriesService(
             seriesList
         }
 
-        return seriesToSeriesListItem(seriesList, isAdult, contentType)
+        return getTranslatedSeriesList(seriesToSeriesListItem(seriesList, isAdult, contentType))
     }
 
     private fun seriesToSeriesListItem(
@@ -338,27 +566,105 @@ class ContentSeriesService(
     }
 
     private fun publishedDaysOfWeekText(publishedDaysOfWeek: Set<SeriesPublishedDaysOfWeek>): String {
+        /**
+         * i18n을 적용하여 언어별로 요일 표시를 변경한다.
+         */
+        val lang = langContext.lang
+
+        val labelRandom = when (lang) {
+            Lang.EN -> "Random"
+            Lang.JA -> "ランダム"
+            else -> "랜덤"
+        }
+        val labels = when (lang) {
+            Lang.EN -> mapOf(
+                SeriesPublishedDaysOfWeek.SUN to "Sun",
+                SeriesPublishedDaysOfWeek.MON to "Mon",
+                SeriesPublishedDaysOfWeek.TUE to "Tue",
+                SeriesPublishedDaysOfWeek.WED to "Wed",
+                SeriesPublishedDaysOfWeek.THU to "Thu",
+                SeriesPublishedDaysOfWeek.FRI to "Fri",
+                SeriesPublishedDaysOfWeek.SAT to "Sat",
+                SeriesPublishedDaysOfWeek.RANDOM to labelRandom
+            )
+
+            Lang.JA -> mapOf(
+                SeriesPublishedDaysOfWeek.SUN to "日",
+                SeriesPublishedDaysOfWeek.MON to "月",
+                SeriesPublishedDaysOfWeek.TUE to "火",
+                SeriesPublishedDaysOfWeek.WED to "水",
+                SeriesPublishedDaysOfWeek.THU to "木",
+                SeriesPublishedDaysOfWeek.FRI to "金",
+                SeriesPublishedDaysOfWeek.SAT to "土",
+                SeriesPublishedDaysOfWeek.RANDOM to labelRandom
+            )
+
+            else -> mapOf(
+                SeriesPublishedDaysOfWeek.SUN to "일",
+                SeriesPublishedDaysOfWeek.MON to "월",
+                SeriesPublishedDaysOfWeek.TUE to "화",
+                SeriesPublishedDaysOfWeek.WED to "수",
+                SeriesPublishedDaysOfWeek.THU to "목",
+                SeriesPublishedDaysOfWeek.FRI to "금",
+                SeriesPublishedDaysOfWeek.SAT to "토",
+                SeriesPublishedDaysOfWeek.RANDOM to labelRandom
+            )
+        }
+
         val dayOfWeekText = publishedDaysOfWeek.toList().sortedBy { it.ordinal }
-            .map {
+            .map { labels[it] ?: it.name }
-                when (it) {
-                    SeriesPublishedDaysOfWeek.SUN -> "일"
-                    SeriesPublishedDaysOfWeek.MON -> "월"
-                    SeriesPublishedDaysOfWeek.TUE -> "화"
-                    SeriesPublishedDaysOfWeek.WED -> "수"
-                    SeriesPublishedDaysOfWeek.THU -> "목"
-                    SeriesPublishedDaysOfWeek.FRI -> "금"
-                    SeriesPublishedDaysOfWeek.SAT -> "토"
-                    SeriesPublishedDaysOfWeek.RANDOM -> "랜덤"
-                }
-            }
             .joinToString(", ") { it }
 
-        return if (publishedDaysOfWeek.contains(SeriesPublishedDaysOfWeek.RANDOM)) {
+        val containsRandom = publishedDaysOfWeek.contains(SeriesPublishedDaysOfWeek.RANDOM)
+        return if (containsRandom) {
             dayOfWeekText
         } else if (publishedDaysOfWeek.size < 7) {
-            "매주 $dayOfWeekText"
+            when (lang) {
+                Lang.EN -> "Every $dayOfWeekText"
+                Lang.JA -> "毎週 $dayOfWeekText"
+                else -> "매주 $dayOfWeekText"
+            }
         } else {
-            "매일"
+            when (lang) {
+                Lang.EN -> "Daily"
+                Lang.JA -> "毎日"
+                else -> "매일"
+            }
+        }
+    }
+
+    /**
+     * 시리즈 리스트의 제목을 현재 언어(locale)에 맞춰 일괄 번역한다.
+     *
+     * 처리 절차:
+     * - 입력된 시리즈들의 seriesId 집합을 만들고, 요청 언어 코드(langContext.lang.code)로
+     *   seriesTranslationRepository에서 번역 데이터를 한 번에 조회한다.
+     * - 각 항목에 대해 번역된 제목이 존재하고 비어있지 않으면 title만 번역 값으로 교체한다.
+     * - 번역이 없거나 공백이면 원본 항목을 그대로 반환한다.
+     *
+     * 성능:
+     * - N건의 항목을 1회의 조회로 해결하기 위해 IN 쿼리를 사용한다.
+     *
+     * @param seriesList 번역 대상 SeriesListItem 목록
+     * @return 제목이 가능한 항목은 번역된 목록(불변 사본), 그 외는 원본 항목 유지
+     */
+    private fun getTranslatedSeriesList(
+        seriesList: List<GetSeriesListResponse.SeriesListItem>
+    ): List<GetSeriesListResponse.SeriesListItem> {
+        val seriesIds = seriesList.map { it.seriesId }
+        if (seriesIds.isEmpty()) return seriesList
+
+        val translations = seriesTranslationRepository
+            .findBySeriesIdInAndLocale(seriesIds = seriesIds, locale = langContext.lang.code)
+            .associateBy { it.seriesId }
+
+        return seriesList.map { item ->
+            val translatedTitle = translations[item.seriesId]?.renderedPayload?.title
+            if (translatedTitle.isNullOrBlank()) {
+                item
+            } else {
+                item.copy(title = translatedTitle)
+            }
         }
     }
 }

src/main/kotlin/kr/co/vividnext/sodalive/content/series/GetSeriesDetailResponse.kt

@@ -1,6 +1,7 @@
 package kr.co.vividnext.sodalive.content.series
 
 import kr.co.vividnext.sodalive.content.series.content.GetSeriesContentListItem
+import kr.co.vividnext.sodalive.content.series.translation.TranslatedSeries
 
 data class GetSeriesDetailResponse(
     val seriesId: Long,
@@ -12,6 +13,7 @@ data class GetSeriesDetailResponse(
     val writer: String?,
     val studio: String?,
     val publishedDate: String,
+    val publishedDateUtc: String,
     val creator: GetSeriesDetailCreator,
     var rentalMinPrice: Int,
     var rentalMaxPrice: Int,
@@ -21,7 +23,9 @@ data class GetSeriesDetailResponse(
     val keywordList: List<String>,
     val publishedDaysOfWeek: String,
     val contentList: List<GetSeriesContentListItem>,
-    val contentCount: Int
+    val contentCount: Int,
+    val translated: TranslatedSeries?,
+    val translatedGenre: String?
 ) {
     data class GetSeriesDetailCreator(
         val creatorId: Long,

src/main/kotlin/kr/co/vividnext/sodalive/content/series/translation/SeriesGenreTranslation.kt

@@ -0,0 +1,21 @@
+package kr.co.vividnext.sodalive.content.series.translation
+
+import kr.co.vividnext.sodalive.common.BaseEntity
+import javax.persistence.Column
+import javax.persistence.Entity
+import javax.persistence.Table
+import javax.persistence.UniqueConstraint
+
+@Entity
+@Table(
+    uniqueConstraints = [
+        UniqueConstraint(columnNames = ["series_genre_id", "locale"])
+    ]
+)
+class SeriesGenreTranslation(
+    @Column(name = "series_genre_id")
+    val seriesGenreId: Long,
+    @Column(name = "locale")
+    val locale: String,
+    var genre: String
+) : BaseEntity()

src/main/kotlin/kr/co/vividnext/sodalive/content/series/translation/SeriesGenreTranslationRepository.kt

@@ -0,0 +1,9 @@
+package kr.co.vividnext.sodalive.content.series.translation
+
+import org.springframework.data.jpa.repository.JpaRepository
+
+interface SeriesGenreTranslationRepository : JpaRepository<SeriesGenreTranslation, Long> {
+    fun findBySeriesGenreIdAndLocale(seriesGenreId: Long, locale: String): SeriesGenreTranslation?
+
+    fun findBySeriesGenreIdInAndLocale(seriesGenreIds: List<Long>, locale: String): List<SeriesGenreTranslation>
+}

src/main/kotlin/kr/co/vividnext/sodalive/content/series/translation/SeriesTranslation.kt

@@ -0,0 +1,79 @@
+package kr.co.vividnext.sodalive.content.series.translation
+
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import kr.co.vividnext.sodalive.common.BaseEntity
+import javax.persistence.AttributeConverter
+import javax.persistence.Column
+import javax.persistence.Convert
+import javax.persistence.Converter
+import javax.persistence.Entity
+
+@Entity
+class SeriesTranslation(
+    val seriesId: Long,
+    val locale: String,
+
+    @Column(columnDefinition = "json")
+    @Convert(converter = SeriesTranslationPayloadConverter::class)
+    var renderedPayload: SeriesTranslationPayload
+) : BaseEntity()
+
+data class SeriesTranslationPayload(
+    val title: String,
+    val introduction: String,
+    val keywords: List<String>
+)
+
+@Converter(autoApply = false)
+class SeriesTranslationPayloadConverter : AttributeConverter<SeriesTranslationPayload, String> {
+
+    override fun convertToDatabaseColumn(attribute: SeriesTranslationPayload?): String {
+        if (attribute == null) return "{}"
+        return objectMapper.writeValueAsString(attribute)
+    }
+
+    override fun convertToEntityAttribute(dbData: String?): SeriesTranslationPayload {
+        if (dbData.isNullOrBlank()) {
+            return SeriesTranslationPayload(
+                title = "",
+                introduction = "",
+                keywords = emptyList()
+            )
+        }
+        // 호환 처리: 과거 스키마에서 keywords가 String 이었을 수 있으므로 유연하게 파싱한다.
+        return try {
+            val node = objectMapper.readTree(dbData)
+            val title = node.get("title")?.asText() ?: ""
+            val introduction = node.get("introduction")?.asText() ?: ""
+            val keywordsNode = node.get("keywords")
+            val keywords: List<String> = when {
+                keywordsNode == null || keywordsNode.isNull -> emptyList()
+                keywordsNode.isArray -> keywordsNode.mapNotNull { it.asText(null) }.filter { it.isNotBlank() }
+                keywordsNode.isTextual -> listOfNotNull(keywordsNode.asText()).filter { it.isNotBlank() }
+                else -> emptyList()
+            }
+            SeriesTranslationPayload(
+                title = title,
+                introduction = introduction,
+                keywords = keywords
+            )
+        } catch (_: Exception) {
+            // 파싱 실패 시 안전한 기본값 반환
+            SeriesTranslationPayload(
+                title = "",
+                introduction = "",
+                keywords = emptyList()
+            )
+        }
+    }
+
+    companion object {
+        private val objectMapper = jacksonObjectMapper()
+    }
+}
+
+data class TranslatedSeries(
+    val title: String,
+    val introduction: String,
+    val keywords: List<String>
+)

src/main/kotlin/kr/co/vividnext/sodalive/content/series/translation/SeriesTranslationRepository.kt

@@ -0,0 +1,8 @@
+package kr.co.vividnext.sodalive.content.series.translation
+
+import org.springframework.data.jpa.repository.JpaRepository
+
+interface SeriesTranslationRepository : JpaRepository<SeriesTranslation, Long> {
+    fun findBySeriesIdAndLocale(seriesId: Long, locale: String): SeriesTranslation?
+    fun findBySeriesIdInAndLocale(seriesIds: List<Long>, locale: String): List<SeriesTranslation>
+}

src/main/kotlin/kr/co/vividnext/sodalive/content/theme/AudioContentTheme.kt

@@ -7,7 +7,7 @@ import javax.persistence.Table
 
 @Entity
 @Table(name = "content_theme")
-data class AudioContentTheme(
+class AudioContentTheme(
     @Column(nullable = false)
     var theme: String,
     @Column(nullable = false)

src/main/kotlin/kr/co/vividnext/sodalive/content/theme/AudioContentThemeController.kt

@@ -27,6 +27,26 @@ class AudioContentThemeController(private val service: AudioContentThemeService)
         ApiResponse.ok(service.getThemes())
     }
 
+    @GetMapping("/active")
+    fun getActiveThemes(
+        @RequestParam("isFree", required = false) isFree: Boolean? = null,
+        @RequestParam("isPointAvailableOnly", required = false) isPointAvailableOnly: Boolean? = null,
+        @RequestParam("isAdultContentVisible", required = false) isAdultContentVisible: Boolean? = null,
+        @RequestParam("contentType", required = false) contentType: ContentType? = null,
+        @AuthenticationPrincipal(expression = "#this == 'anonymousUser' ? null : member") member: Member?
+    ) = run {
+        if (member == null) throw SodaException("로그인 정보를 확인해주세요.")
+
+        ApiResponse.ok(
+            service.getActiveThemeOfContent(
+                isAdult = member.auth != null && (isAdultContentVisible ?: true),
+                isFree = isFree ?: false,
+                isPointAvailableOnly = isPointAvailableOnly ?: false,
+                contentType = contentType ?: ContentType.ALL
+            )
+        )
+    }
+
     @GetMapping("/{id}/content")
     fun getContentByTheme(
         @PathVariable id: Long,

src/main/kotlin/kr/co/vividnext/sodalive/content/theme/AudioContentThemeQueryRepository.kt

@@ -1,5 +1,6 @@
 package kr.co.vividnext.sodalive.content.theme
 
+import com.querydsl.core.types.dsl.CaseBuilder
 import com.querydsl.jpa.impl.JPAQueryFactory
 import kr.co.vividnext.sodalive.content.ContentType
 import kr.co.vividnext.sodalive.content.QAudioContent.audioContent
@@ -14,6 +15,10 @@ class AudioContentThemeQueryRepository(
     @Value("\${cloud.aws.cloud-front.host}")
     private val cloudFrontHost: String
 ) {
+    data class ThemeIdAndName(
+        val id: Long,
+        val theme: String
+    )
     fun getActiveThemes(): List<GetAudioContentThemeResponse> {
         return queryFactory
             .select(
@@ -32,6 +37,7 @@ class AudioContentThemeQueryRepository(
     fun getActiveThemeOfContent(
         isAdult: Boolean = false,
         isFree: Boolean = false,
+        isPointAvailableOnly: Boolean = false,
         contentType: ContentType
     ): List<String> {
         var where = audioContent.isActive.isTrue
@@ -59,15 +65,94 @@ class AudioContentThemeQueryRepository(
             where = where.and(audioContent.price.loe(0))
         }
 
-        return queryFactory
+        if (isPointAvailableOnly) {
+            where = where.and(audioContent.isPointAvailable.isTrue)
+        }
+
+        val query = queryFactory
             .select(audioContentTheme.theme)
             .from(audioContent)
             .innerJoin(audioContent.member, member)
             .innerJoin(audioContent.theme, audioContentTheme)
             .where(where)
             .groupBy(audioContentTheme.id)
-            .orderBy(audioContentTheme.orders.asc())
+
-            .fetch()
+        if (isFree) {
+            query.orderBy(
+                CaseBuilder()
+                    .`when`(audioContentTheme.theme.eq("자기소개")).then(0)
+                    .otherwise(1)
+                    .asc(),
+                audioContentTheme.orders.asc()
+            )
+        } else {
+            query.orderBy(audioContentTheme.orders.asc())
+        }
+
+        return query.fetch()
+    }
+
+    fun getActiveThemeWithIdsOfContent(
+        isAdult: Boolean = false,
+        isFree: Boolean = false,
+        isPointAvailableOnly: Boolean = false,
+        contentType: ContentType
+    ): List<ThemeIdAndName> {
+        var where = audioContent.isActive.isTrue
+            .and(audioContentTheme.isActive.isTrue)
+
+        if (!isAdult) {
+            where = where.and(audioContent.isAdult.isFalse)
+        } else {
+            if (contentType != ContentType.ALL) {
+                where = where.and(
+                    audioContent.member.isNull.or(
+                        audioContent.member.auth.gender.eq(
+                            if (contentType == ContentType.MALE) {
+                                0
+                            } else {
+                                1
+                            }
+                        )
+                    )
+                )
+            }
+        }
+
+        if (isFree) {
+            where = where.and(audioContent.price.loe(0))
+        }
+
+        if (isPointAvailableOnly) {
+            where = where.and(audioContent.isPointAvailable.isTrue)
+        }
+
+        val query = queryFactory
+            .select(audioContentTheme.id, audioContentTheme.theme)
+            .from(audioContent)
+            .innerJoin(audioContent.member, member)
+            .innerJoin(audioContent.theme, audioContentTheme)
+            .where(where)
+            .groupBy(audioContentTheme.id)
+
+        if (isFree) {
+            query.orderBy(
+                CaseBuilder()
+                    .`when`(audioContentTheme.theme.eq("자기소개")).then(0)
+                    .otherwise(1)
+                    .asc(),
+                audioContentTheme.orders.asc()
+            )
+        } else {
+            query.orderBy(audioContentTheme.orders.asc())
+        }
+
+        return query.fetch().map { tuple ->
+            ThemeIdAndName(
+                id = tuple.get(audioContentTheme.id)!!,
+                theme = tuple.get(audioContentTheme.theme)!!
+            )
+        }
     }
 
     fun findThemeByIdAndActive(id: Long): AudioContentTheme? {

src/main/kotlin/kr/co/vividnext/sodalive/content/theme/AudioContentThemeService.kt

@@ -5,6 +5,12 @@ import kr.co.vividnext.sodalive.content.AudioContentRepository
 import kr.co.vividnext.sodalive.content.ContentType
 import kr.co.vividnext.sodalive.content.SortType
 import kr.co.vividnext.sodalive.content.theme.content.GetContentByThemeResponse
+import kr.co.vividnext.sodalive.content.theme.translation.ContentThemeTranslation
+import kr.co.vividnext.sodalive.content.theme.translation.ContentThemeTranslationRepository
+import kr.co.vividnext.sodalive.i18n.Lang
+import kr.co.vividnext.sodalive.i18n.LangContext
+import kr.co.vividnext.sodalive.i18n.translation.PapagoTranslationService
+import kr.co.vividnext.sodalive.i18n.translation.TranslateRequest
 import kr.co.vividnext.sodalive.member.Member
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
@@ -12,24 +18,94 @@ import org.springframework.transaction.annotation.Transactional
 @Service
 class AudioContentThemeService(
     private val queryRepository: AudioContentThemeQueryRepository,
-    private val contentRepository: AudioContentRepository
+    private val contentRepository: AudioContentRepository,
+    private val contentThemeTranslationRepository: ContentThemeTranslationRepository,
+
+    private val papagoTranslationService: PapagoTranslationService,
+    private val langContext: LangContext
 ) {
     @Transactional(readOnly = true)
     fun getThemes(): List<GetAudioContentThemeResponse> {
         return queryRepository.getActiveThemes()
     }
 
-    @Transactional(readOnly = true)
+    @Transactional
     fun getActiveThemeOfContent(
         isAdult: Boolean = false,
         isFree: Boolean = false,
+        isPointAvailableOnly: Boolean = false,
         contentType: ContentType
     ): List<String> {
-        return queryRepository.getActiveThemeOfContent(
+        val themesWithIds = queryRepository.getActiveThemeWithIdsOfContent(
             isAdult = isAdult,
             isFree = isFree,
+            isPointAvailableOnly = isPointAvailableOnly,
             contentType = contentType
         )
+
+        /**
+         * langContext.lang == Lang.EN || Lang.JA 일 때 번역된 콘텐츠 테마 반환
+         * 번역이 없으면 번역 API 호출 후 저장하고 반환
+         */
+        val currentLang = langContext.lang
+        if (currentLang == Lang.EN || currentLang == Lang.JA) {
+            val targetLocale = currentLang.code
+            // 1) 기존 번역을 한 번에 조회
+            val ids = themesWithIds.map { it.id }
+            val existingTranslations = if (ids.isNotEmpty()) {
+                contentThemeTranslationRepository.findByContentThemeIdInAndLocale(ids, targetLocale)
+            } else {
+                emptyList()
+            }
+
+            val existingMap = existingTranslations.associateBy { it.contentThemeId }
+
+            // 2) 미번역 항목만 수집하여 한 번에 번역 요청
+            val untranslatedPairs = themesWithIds.filter { existingMap[it.id] == null }
+
+            if (untranslatedPairs.isNotEmpty()) {
+                val texts = untranslatedPairs.map { it.theme }
+
+                val response = papagoTranslationService.translate(
+                    request = TranslateRequest(
+                        texts = texts,
+                        sourceLanguage = "ko",
+                        targetLanguage = targetLocale
+                    )
+                )
+
+                val translatedTexts = response.translatedText
+                val entitiesToSave = mutableListOf<ContentThemeTranslation>()
+
+                // translatedTexts 크기가 다르면 안전하게 원문으로 대체
+                untranslatedPairs.forEachIndexed { index, pair ->
+                    val translated = translatedTexts.getOrNull(index) ?: pair.theme
+                    entitiesToSave.add(
+                        ContentThemeTranslation(
+                            contentThemeId = pair.id,
+                            locale = targetLocale,
+                            theme = translated
+                        )
+                    )
+                }
+
+                if (entitiesToSave.isNotEmpty()) {
+                    contentThemeTranslationRepository.saveAll(entitiesToSave)
+                }
+
+                // 저장 후 맵을 갱신
+                entitiesToSave.forEach { entity ->
+                    (existingMap as MutableMap)[entity.contentThemeId] = entity
+                }
+            }
+
+            // 3) 원래 순서대로 결과 조립 (번역 없으면 원문 fallback)
+            return themesWithIds.map { pair ->
+                existingMap[pair.id]?.theme ?: pair.theme
+            }
+        }
+
+        return themesWithIds.map { it.theme }
     }
 
     @Transactional(readOnly = true)

src/main/kotlin/kr/co/vividnext/sodalive/content/theme/translation/ContentThemeTranslation.kt

@@ -0,0 +1,11 @@
+package kr.co.vividnext.sodalive.content.theme.translation
+
+import kr.co.vividnext.sodalive.common.BaseEntity
+import javax.persistence.Entity
+
+@Entity
+class ContentThemeTranslation(
+    val contentThemeId: Long,
+    val locale: String,
+    var theme: String
+) : BaseEntity()

src/main/kotlin/kr/co/vividnext/sodalive/content/theme/translation/ContentThemeTranslationRepository.kt

@@ -0,0 +1,9 @@
+package kr.co.vividnext.sodalive.content.theme.translation
+
+import org.springframework.data.jpa.repository.JpaRepository
+
+interface ContentThemeTranslationRepository : JpaRepository<ContentThemeTranslation, Long> {
+    fun findByContentThemeIdAndLocale(contentThemeId: Long, locale: String): ContentThemeTranslation?
+
+    fun findByContentThemeIdInAndLocale(contentThemeIds: Collection<Long>, locale: String): List<ContentThemeTranslation>
+}

src/main/kotlin/kr/co/vividnext/sodalive/content/translation/ContentTranslation.kt

@@ -0,0 +1,63 @@
+package kr.co.vividnext.sodalive.content.translation
+
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.module.kotlin.readValue
+import kr.co.vividnext.sodalive.common.BaseEntity
+import javax.persistence.AttributeConverter
+import javax.persistence.Column
+import javax.persistence.Convert
+import javax.persistence.Converter
+import javax.persistence.Entity
+import javax.persistence.Table
+import javax.persistence.UniqueConstraint
+
+@Entity
+@Table(
+    uniqueConstraints = [
+        UniqueConstraint(columnNames = ["contentId", "locale"])
+    ]
+)
+class ContentTranslation(
+    val contentId: Long,
+    val locale: String,
+
+    @Column(columnDefinition = "json")
+    @Convert(converter = ContentTranslationPayloadConverter::class)
+    var renderedPayload: ContentTranslationPayload
+) : BaseEntity()
+
+data class ContentTranslationPayload(
+    val title: String,
+    val detail: String,
+    val tags: String
+)
+
+@Converter(autoApply = false)
+class ContentTranslationPayloadConverter : AttributeConverter<ContentTranslationPayload, String> {
+
+    override fun convertToDatabaseColumn(attribute: ContentTranslationPayload?): String {
+        if (attribute == null) return "{}"
+        return objectMapper.writeValueAsString(attribute)
+    }
+
+    override fun convertToEntityAttribute(dbData: String?): ContentTranslationPayload {
+        if (dbData.isNullOrBlank()) {
+            return ContentTranslationPayload(
+                title = "",
+                detail = "",
+                tags = ""
+            )
+        }
+        return objectMapper.readValue(dbData)
+    }
+
+    companion object {
+        private val objectMapper = jacksonObjectMapper()
+    }
+}
+
+data class TranslatedContent(
+    val title: String?,
+    val detail: String?,
+    val tags: String?
+)

src/main/kotlin/kr/co/vividnext/sodalive/content/translation/ContentTranslationRepository.kt

@@ -0,0 +1,9 @@
+package kr.co.vividnext.sodalive.content.translation
+
+import org.springframework.data.jpa.repository.JpaRepository
+
+interface ContentTranslationRepository : JpaRepository<ContentTranslation, Long> {
+    fun findByContentIdAndLocale(contentId: Long, locale: String): ContentTranslation?
+
+    fun findByContentIdInAndLocale(contentIds: List<Long>, locale: String): List<ContentTranslation>
+}

src/main/kotlin/kr/co/vividnext/sodalive/creator/admin/content/CreatorAdminContentService.kt

@@ -10,9 +10,12 @@ import kr.co.vividnext.sodalive.content.ContentPriceChangeLogRepository
 import kr.co.vividnext.sodalive.content.hashtag.AudioContentHashTag
 import kr.co.vividnext.sodalive.content.hashtag.HashTag
 import kr.co.vividnext.sodalive.content.hashtag.HashTagRepository
+import kr.co.vividnext.sodalive.i18n.translation.LanguageTranslationEvent
+import kr.co.vividnext.sodalive.i18n.translation.LanguageTranslationTargetType
 import kr.co.vividnext.sodalive.member.Member
 import kr.co.vividnext.sodalive.utils.generateFileName
 import org.springframework.beans.factory.annotation.Value
+import org.springframework.context.ApplicationEventPublisher
 import org.springframework.data.domain.Pageable
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
@@ -27,6 +30,8 @@ class CreatorAdminContentService(
     private val objectMapper: ObjectMapper,
     private val s3Uploader: S3Uploader,
 
+    private val applicationEventPublisher: ApplicationEventPublisher,
+
     @Value("\${cloud.aws.s3.bucket}")
     private val bucket: String,
 
@@ -194,6 +199,13 @@ class CreatorAdminContentService(
             }
 
             audioContent.audioContentHashTags.addAll(newAudioContentHashTagList)
+
+            applicationEventPublisher.publishEvent(
+                LanguageTranslationEvent(
+                    id = request.id,
+                    targetType = LanguageTranslationTargetType.CONTENT
+                )
+            )
         }
     }
 }

src/main/kotlin/kr/co/vividnext/sodalive/creator/admin/content/series/CreatorAdminContentSeriesService.kt

@@ -5,6 +5,8 @@ import com.fasterxml.jackson.databind.ObjectMapper
 import kr.co.vividnext.sodalive.aws.s3.S3Uploader
 import kr.co.vividnext.sodalive.common.SodaException
 import kr.co.vividnext.sodalive.content.AudioContentRepository
+import kr.co.vividnext.sodalive.content.LanguageDetectEvent
+import kr.co.vividnext.sodalive.content.LanguageDetectTargetType
 import kr.co.vividnext.sodalive.content.hashtag.HashTag
 import kr.co.vividnext.sodalive.content.hashtag.HashTagRepository
 import kr.co.vividnext.sodalive.creator.admin.content.series.content.AddingContentToTheSeriesRequest
@@ -12,9 +14,12 @@ import kr.co.vividnext.sodalive.creator.admin.content.series.content.RemoveConte
 import kr.co.vividnext.sodalive.creator.admin.content.series.content.SearchContentNotInSeriesResponse
 import kr.co.vividnext.sodalive.creator.admin.content.series.genre.CreatorAdminContentSeriesGenreRepository
 import kr.co.vividnext.sodalive.creator.admin.content.series.keyword.SeriesKeyword
+import kr.co.vividnext.sodalive.i18n.translation.LanguageTranslationEvent
+import kr.co.vividnext.sodalive.i18n.translation.LanguageTranslationTargetType
 import kr.co.vividnext.sodalive.member.Member
 import kr.co.vividnext.sodalive.utils.generateFileName
 import org.springframework.beans.factory.annotation.Value
+import org.springframework.context.ApplicationEventPublisher
 import org.springframework.data.repository.findByIdOrNull
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
@@ -30,6 +35,8 @@ class CreatorAdminContentSeriesService(
     private val s3Uploader: S3Uploader,
     private val objectMapper: ObjectMapper,
 
+    private val applicationEventPublisher: ApplicationEventPublisher,
+
     @Value("\${cloud.aws.s3.bucket}")
     private val coverImageBucket: String,
 
@@ -89,6 +96,31 @@ class CreatorAdminContentSeriesService(
         )
 
         series.coverImage = coverImagePath
+
+        if (series.languageCode.isNullOrBlank()) {
+            val papagoQuery = listOf(
+                request.title.trim(),
+                request.introduction.trim(),
+                request.keyword.trim()
+            )
+                .filter { it.isNotBlank() }
+                .joinToString(" ")
+
+            applicationEventPublisher.publishEvent(
+                LanguageDetectEvent(
+                    id = series.id!!,
+                    query = papagoQuery,
+                    targetType = LanguageDetectTargetType.SERIES
+                )
+            )
+        } else {
+            applicationEventPublisher.publishEvent(
+                LanguageTranslationEvent(
+                    id = series.id!!,
+                    targetType = LanguageTranslationTargetType.SERIES
+                )
+            )
+        }
     }
 
     @Transactional
@@ -174,6 +206,15 @@ class CreatorAdminContentSeriesService(
         if (request.studio != null) {
             series.studio = request.studio
         }
+
+        if (request.title != null || request.introduction != null) {
+            applicationEventPublisher.publishEvent(
+                LanguageTranslationEvent(
+                    id = series.id!!,
+                    targetType = LanguageTranslationTargetType.SERIES
+                )
+            )
+        }
     }
 
     fun getSeriesList(offset: Long, limit: Long, creatorId: Long): GetCreatorAdminContentSeriesListResponse {

src/main/kotlin/kr/co/vividnext/sodalive/creator/admin/content/series/Series.kt

@@ -34,6 +34,7 @@ data class Series(
     var title: String,
     @Column(columnDefinition = "TEXT", nullable = false)
     var introduction: String,
+    var languageCode: String? = null,
     @Enumerated(value = EnumType.STRING)
     var state: SeriesState = SeriesState.PROCEEDING,
     var writer: String? = null,

src/main/kotlin/kr/co/vividnext/sodalive/explorer/ExplorerQueryRepository.kt

@@ -488,6 +488,7 @@ class ExplorerQueryRepository(
                         "$cloudFrontHost/profile/default-profile.png"
                     },
                     content = it.cheers,
+                    languageCode = it.languageCode,
                     date = date.format(DateTimeFormatter.ofPattern("yyyy.MM.dd E hh:mm a")),
                     replyList = it.children.asSequence()
                         .map { cheers ->
@@ -505,6 +506,7 @@ class ExplorerQueryRepository(
                                     "$cloudFrontHost/profile/default-profile.png"
                                 },
                                 content = cheers.cheers,
+                                languageCode = cheers.languageCode,
                                 date = replyDate.format(DateTimeFormatter.ofPattern("yyyy.MM.dd E hh:mm a")),
                                 replyList = listOf()
                             )

src/main/kotlin/kr/co/vividnext/sodalive/explorer/ExplorerService.kt

@@ -3,8 +3,11 @@ package kr.co.vividnext.sodalive.explorer
 import kr.co.vividnext.sodalive.common.SodaException
 import kr.co.vividnext.sodalive.content.AudioContentService
 import kr.co.vividnext.sodalive.content.ContentType
+import kr.co.vividnext.sodalive.content.LanguageDetectEvent
+import kr.co.vividnext.sodalive.content.LanguageDetectTargetType
 import kr.co.vividnext.sodalive.content.SortType
 import kr.co.vividnext.sodalive.content.series.ContentSeriesService
+import kr.co.vividnext.sodalive.content.translation.ContentTranslationRepository
 import kr.co.vividnext.sodalive.explorer.follower.GetFollowerListResponse
 import kr.co.vividnext.sodalive.explorer.follower.GetFollowerListResponseItem
 import kr.co.vividnext.sodalive.explorer.profile.ChannelNotice
@@ -16,6 +19,7 @@ import kr.co.vividnext.sodalive.explorer.profile.PutWriteCheersRequest
 import kr.co.vividnext.sodalive.explorer.profile.creatorCommunity.CreatorCommunityService
 import kr.co.vividnext.sodalive.fcm.FcmEvent
 import kr.co.vividnext.sodalive.fcm.FcmEventType
+import kr.co.vividnext.sodalive.i18n.LangContext
 import kr.co.vividnext.sodalive.live.room.detail.GetRoomDetailUser
 import kr.co.vividnext.sodalive.member.Member
 import kr.co.vividnext.sodalive.member.MemberRole
@@ -44,6 +48,9 @@ class ExplorerService(
     private val seriesService: ContentSeriesService,
 
     private val applicationEventPublisher: ApplicationEventPublisher,
+    private val contentTranslationRepository: ContentTranslationRepository,
+
+    private val langContext: LangContext,
 
     @Value("\${cloud.aws.cloud-front.host}")
     private val cloudFrontHost: String
@@ -230,6 +237,24 @@ class ExplorerService(
             listOf()
         }
 
+        val contentIds = contentList.map { it.contentId }
+        val translatedContentList = if (contentIds.isNotEmpty()) {
+            val translations = contentTranslationRepository
+                .findByContentIdInAndLocale(contentIds = contentIds, locale = langContext.lang.code)
+                .associateBy { it.contentId }
+
+            contentList.map { item ->
+                val translatedTitle = translations[item.contentId]?.renderedPayload?.title
+                if (translatedTitle.isNullOrBlank()) {
+                    item
+                } else {
+                    item.copy(title = translatedTitle)
+                }
+            }
+        } else {
+            contentList
+        }
+
         // 크리에이터의 최신 오디오 콘텐츠 1개
         val latestContent = if (isCreator) {
             audioContentService.getLatestCreatorAudioContent(creatorId, member, isAdultContentVisible)
@@ -330,7 +355,7 @@ class ExplorerService(
             userDonationRanking = memberDonationRanking,
             similarCreatorList = similarCreatorList,
             liveRoomList = liveRoomList,
-            contentList = contentList,
+            contentList = translatedContentList,
             latestContent = latestContent,
             totalContentCount = totalContentCount,
             ownedContentCount = ownedContentCount,
@@ -441,7 +466,7 @@ class ExplorerService(
         val isBlocked = memberService.isBlocked(blockedMemberId = member.id!!, memberId = request.creatorId)
         if (isBlocked) throw SodaException("${creator.nickname}님의 요청으로 팬토크 작성이 제한됩니다.")
 
-        val cheers = CreatorCheers(cheers = request.content)
+        val cheers = CreatorCheers(cheers = request.content, languageCode = request.languageCode)
         cheers.member = member
         cheers.creator = creator
 
@@ -456,6 +481,17 @@ class ExplorerService(
         }
 
         cheersRepository.save(cheers)
+
+        // 언어 코드가 지정되지 않은 경우, 파파고 언어 감지 API를 통해 비동기로 언어를 식별한다.
+        if (request.languageCode.isNullOrBlank()) {
+            applicationEventPublisher.publishEvent(
+                LanguageDetectEvent(
+                    id = cheers.id!!,
+                    query = request.content,
+                    targetType = LanguageDetectTargetType.CREATOR_CHEERS
+                )
+            )
+        }
     }
 
     fun getCreatorProfileCheers(

src/main/kotlin/kr/co/vividnext/sodalive/explorer/GetCheersResponse.kt

@@ -11,6 +11,7 @@ data class GetCheersResponseItem(
     val nickname: String,
     val profileUrl: String,
     val content: String,
+    val languageCode: String?,
     val date: String,
     val replyList: List<GetCheersResponseItem>
 )

src/main/kotlin/kr/co/vividnext/sodalive/explorer/profile/CreatorCheers.kt

@@ -13,6 +13,7 @@ import javax.persistence.OneToMany
 data class CreatorCheers(
     @Column(columnDefinition = "TEXT", nullable = false)
     var cheers: String,
+    var languageCode: String?,
     var isActive: Boolean = true
 ) : BaseEntity() {
     @ManyToOne(fetch = FetchType.LAZY)

src/main/kotlin/kr/co/vividnext/sodalive/explorer/profile/PostWriteCheersRequest.kt

@@ -3,5 +3,6 @@ package kr.co.vividnext.sodalive.explorer.profile
 data class PostWriteCheersRequest(
     val parentId: Long? = null,
     val creatorId: Long,
-    val content: String
+    val content: String,
+    val languageCode: String? = null
 )

src/main/kotlin/kr/co/vividnext/sodalive/i18n/Lang.kt

@@ -0,0 +1,22 @@
+package kr.co.vividnext.sodalive.i18n
+
+import java.util.Locale
+
+enum class Lang(val code: String, val locale: Locale) {
+    KO("ko", Locale.KOREAN),
+    EN("en", Locale.ENGLISH),
+    JA("ja", Locale.JAPANESE);
+
+    companion object {
+        fun fromAcceptLanguage(header: String?): Lang {
+            if (header.isNullOrBlank()) return KO
+            val two = header.trim().lowercase().take(2) // 앱은 2자리만 보내지만 안전하게 처리
+            return when (two) {
+                "ko" -> KO
+                "en" -> EN
+                "ja" -> JA
+                else -> KO
+            }
+        }
+    }
+}

src/main/kotlin/kr/co/vividnext/sodalive/i18n/LangContext.kt

@@ -0,0 +1,15 @@
+package kr.co.vividnext.sodalive.i18n
+
+import org.springframework.stereotype.Component
+import org.springframework.web.context.annotation.RequestScope
+
+@Component
+@RequestScope
+class LangContext {
+    var lang: Lang = Lang.KO
+        internal set
+
+    fun setLang(lang: Lang) {
+        this.lang = lang
+    }
+}

src/main/kotlin/kr/co/vividnext/sodalive/i18n/LangInterceptor.kt

@@ -0,0 +1,21 @@
+package kr.co.vividnext.sodalive.i18n
+
+import org.springframework.stereotype.Component
+import org.springframework.web.servlet.HandlerInterceptor
+import javax.servlet.http.HttpServletRequest
+import javax.servlet.http.HttpServletResponse
+
+@Component
+class LangInterceptor(
+    private val langContext: LangContext
+) : HandlerInterceptor {
+    override fun preHandle(
+        request: HttpServletRequest,
+        response: HttpServletResponse,
+        handler: Any
+    ): Boolean {
+        val acceptLanguage = request.getHeader("Accept-Language")
+        langContext.setLang(Lang.fromAcceptLanguage(acceptLanguage))
+        return true
+    }
+}

src/main/kotlin/kr/co/vividnext/sodalive/i18n/translation/LanguageTranslationEvent.kt

@@ -0,0 +1,456 @@
+package kr.co.vividnext.sodalive.i18n.translation
+
+import kr.co.vividnext.sodalive.admin.content.series.AdminContentSeriesRepository
+import kr.co.vividnext.sodalive.admin.content.series.genre.AdminContentSeriesGenreRepository
+import kr.co.vividnext.sodalive.chat.character.repository.ChatCharacterRepository
+import kr.co.vividnext.sodalive.chat.character.translate.AiCharacterTranslation
+import kr.co.vividnext.sodalive.chat.character.translate.AiCharacterTranslationRenderedPayload
+import kr.co.vividnext.sodalive.chat.character.translate.AiCharacterTranslationRepository
+import kr.co.vividnext.sodalive.chat.character.translate.TranslatedAiCharacterBackground
+import kr.co.vividnext.sodalive.chat.character.translate.TranslatedAiCharacterPersonality
+import kr.co.vividnext.sodalive.chat.original.OriginalWorkRepository
+import kr.co.vividnext.sodalive.chat.original.translation.OriginalWorkTranslation
+import kr.co.vividnext.sodalive.chat.original.translation.OriginalWorkTranslationPayload
+import kr.co.vividnext.sodalive.chat.original.translation.OriginalWorkTranslationRepository
+import kr.co.vividnext.sodalive.content.AudioContentRepository
+import kr.co.vividnext.sodalive.content.series.translation.SeriesGenreTranslation
+import kr.co.vividnext.sodalive.content.series.translation.SeriesGenreTranslationRepository
+import kr.co.vividnext.sodalive.content.series.translation.SeriesTranslation
+import kr.co.vividnext.sodalive.content.series.translation.SeriesTranslationPayload
+import kr.co.vividnext.sodalive.content.series.translation.SeriesTranslationRepository
+import kr.co.vividnext.sodalive.content.theme.AudioContentThemeQueryRepository
+import kr.co.vividnext.sodalive.content.theme.translation.ContentThemeTranslation
+import kr.co.vividnext.sodalive.content.theme.translation.ContentThemeTranslationRepository
+import kr.co.vividnext.sodalive.content.translation.ContentTranslation
+import kr.co.vividnext.sodalive.content.translation.ContentTranslationPayload
+import kr.co.vividnext.sodalive.content.translation.ContentTranslationRepository
+import kr.co.vividnext.sodalive.i18n.translation.PapagoTranslationService.Companion.getTranslatableLanguageCodes
+import org.springframework.data.repository.findByIdOrNull
+import org.springframework.scheduling.annotation.Async
+import org.springframework.stereotype.Component
+import org.springframework.transaction.annotation.Propagation
+import org.springframework.transaction.annotation.Transactional
+import org.springframework.transaction.event.TransactionPhase
+import org.springframework.transaction.event.TransactionalEventListener
+
+enum class LanguageTranslationTargetType {
+    CONTENT,
+    CHARACTER,
+    CONTENT_THEME,
+
+    SERIES,
+    SERIES_GENRE,
+
+    ORIGINAL_WORK
+}
+
+class LanguageTranslationEvent(
+    val id: Long,
+    val targetType: LanguageTranslationTargetType
+)
+
+@Component
+class LanguageTranslationListener(
+    private val audioContentRepository: AudioContentRepository,
+    private val chatCharacterRepository: ChatCharacterRepository,
+    private val audioContentThemeRepository: AudioContentThemeQueryRepository,
+    private val seriesRepository: AdminContentSeriesRepository,
+    private val seriesGenreRepository: AdminContentSeriesGenreRepository,
+    private val originalWorkRepository: OriginalWorkRepository,
+
+    private val contentTranslationRepository: ContentTranslationRepository,
+    private val aiCharacterTranslationRepository: AiCharacterTranslationRepository,
+    private val contentThemeTranslationRepository: ContentThemeTranslationRepository,
+    private val seriesTranslationRepository: SeriesTranslationRepository,
+    private val seriesGenreTranslationRepository: SeriesGenreTranslationRepository,
+    private val originalWorkTranslationRepository: OriginalWorkTranslationRepository,
+
+    private val translationService: PapagoTranslationService
+) {
+    @Async
+    @TransactionalEventListener(phase = TransactionPhase.AFTER_COMMIT)
+    @Transactional(propagation = Propagation.REQUIRES_NEW)
+    fun translation(event: LanguageTranslationEvent) {
+        when (event.targetType) {
+            LanguageTranslationTargetType.CONTENT -> handleContentLanguageTranslation(event)
+            LanguageTranslationTargetType.CHARACTER -> handleCharacterLanguageTranslation(event)
+            LanguageTranslationTargetType.CONTENT_THEME -> handleContentThemeLanguageTranslation(event)
+            LanguageTranslationTargetType.SERIES -> handleSeriesLanguageTranslation(event)
+            LanguageTranslationTargetType.SERIES_GENRE -> handleSeriesGenreLanguageTranslation(event)
+            LanguageTranslationTargetType.ORIGINAL_WORK -> handleOriginalWorkLanguageTranslation(event)
+        }
+    }
+
+    private fun handleContentLanguageTranslation(event: LanguageTranslationEvent) {
+        val audioContent = audioContentRepository.findByIdOrNull(event.id) ?: return
+        val languageCode = audioContent.languageCode
+        if (languageCode != null) return
+
+        getTranslatableLanguageCodes(languageCode).forEach { locale ->
+            val tags = audioContent.audioContentHashTags
+                .mapNotNull { it.hashTag?.tag }
+                .joinToString(",")
+
+            val texts = mutableListOf<String>()
+            texts.add(audioContent.title)
+            texts.add(audioContent.detail)
+            texts.add(tags)
+
+            val sourceLanguage = audioContent.languageCode ?: "ko"
+
+            val response = translationService.translate(
+                request = TranslateRequest(
+                    texts = texts,
+                    sourceLanguage = sourceLanguage,
+                    targetLanguage = locale
+                )
+            )
+
+            val translatedTexts = response.translatedText
+            if (translatedTexts.size == texts.size) {
+                var index = 0
+
+                val translatedTitle = translatedTexts[index++]
+                val translatedDetail = translatedTexts[index++]
+                val translatedTags = translatedTexts[index]
+
+                val payload = ContentTranslationPayload(
+                    title = translatedTitle,
+                    detail = translatedDetail,
+                    tags = translatedTags
+                )
+
+                val existing = contentTranslationRepository
+                    .findByContentIdAndLocale(audioContent.id!!, locale)
+
+                if (existing == null) {
+                    contentTranslationRepository.save(
+                        ContentTranslation(
+                            contentId = audioContent.id!!,
+                            locale = locale,
+                            renderedPayload = payload
+                        )
+                    )
+                } else {
+                    existing.renderedPayload = payload
+                    contentTranslationRepository.save(existing)
+                }
+            }
+        }
+    }
+
+    private fun handleCharacterLanguageTranslation(event: LanguageTranslationEvent) {
+        val character = chatCharacterRepository.findByIdOrNull(event.id) ?: return
+        val languageCode = character.languageCode
+        if (languageCode != null) return
+
+        getTranslatableLanguageCodes(languageCode).forEach { locale ->
+            val personality = character.personalities.firstOrNull()
+            val background = character.backgrounds.firstOrNull()
+
+            val tags = character.tagMappings.joinToString(",") { it.tag.tag }
+
+            val texts = mutableListOf<String>()
+            texts.add(character.name)
+            texts.add(character.description)
+            texts.add(character.gender ?: "")
+
+            val hasPersonality = personality != null
+            if (hasPersonality) {
+                texts.add(personality!!.trait)
+                texts.add(personality.description)
+            }
+
+            val hasBackground = background != null
+            if (hasBackground) {
+                texts.add(background!!.topic)
+                texts.add(background.description)
+            }
+
+            texts.add(tags)
+
+            val sourceLanguage = character.languageCode ?: "ko"
+
+            val response = translationService.translate(
+                request = TranslateRequest(
+                    texts = texts,
+                    sourceLanguage = sourceLanguage,
+                    targetLanguage = locale
+                )
+            )
+
+            val translatedTexts = response.translatedText
+            if (translatedTexts.size == texts.size) {
+                var index = 0
+
+                val translatedName = translatedTexts[index++]
+                val translatedDescription = translatedTexts[index++]
+                val translatedGender = translatedTexts[index++]
+
+                var translatedPersonality: TranslatedAiCharacterPersonality? = null
+                if (hasPersonality) {
+                    translatedPersonality = TranslatedAiCharacterPersonality(
+                        trait = translatedTexts[index++],
+                        description = translatedTexts[index++]
+                    )
+                }
+
+                var translatedBackground: TranslatedAiCharacterBackground? = null
+                if (hasBackground) {
+                    translatedBackground = TranslatedAiCharacterBackground(
+                        topic = translatedTexts[index++],
+                        description = translatedTexts[index++]
+                    )
+                }
+
+                val translatedTags = translatedTexts[index]
+
+                val payload = AiCharacterTranslationRenderedPayload(
+                    name = translatedName,
+                    description = translatedDescription,
+                    gender = translatedGender,
+                    personalityTrait = translatedPersonality?.trait ?: "",
+                    personalityDescription = translatedPersonality?.description ?: "",
+                    backgroundTopic = translatedBackground?.topic ?: "",
+                    backgroundDescription = translatedBackground?.description ?: "",
+                    tags = translatedTags
+                )
+
+                val existing = aiCharacterTranslationRepository
+                    .findByCharacterIdAndLocale(character.id!!, locale)
+
+                if (existing == null) {
+                    val entity = AiCharacterTranslation(
+                        characterId = character.id!!,
+                        locale = locale,
+                        renderedPayload = payload
+                    )
+
+                    aiCharacterTranslationRepository.save(entity)
+                } else {
+                    existing.renderedPayload = payload
+                    aiCharacterTranslationRepository.save(existing)
+                }
+            }
+        }
+    }
+
+    private fun handleContentThemeLanguageTranslation(event: LanguageTranslationEvent) {
+        val contentTheme = audioContentThemeRepository.findThemeByIdAndActive(event.id) ?: return
+
+        val sourceLanguage = "ko"
+        getTranslatableLanguageCodes(sourceLanguage).forEach { locale ->
+            val texts = mutableListOf<String>()
+            texts.add(contentTheme.theme)
+
+            val response = translationService.translate(
+                request = TranslateRequest(
+                    texts = texts,
+                    sourceLanguage = sourceLanguage,
+                    targetLanguage = locale
+                )
+            )
+
+            val translatedTexts = response.translatedText
+            if (translatedTexts.size == texts.size) {
+                val translatedTheme = translatedTexts[0]
+
+                val existing = contentThemeTranslationRepository
+                    .findByContentThemeIdAndLocale(contentTheme.id!!, locale)
+
+                if (existing == null) {
+                    contentThemeTranslationRepository.save(
+                        ContentThemeTranslation(
+                            contentThemeId = contentTheme.id!!,
+                            locale = locale,
+                            theme = translatedTheme
+                        )
+                    )
+                } else {
+                    existing.theme = translatedTheme
+                    contentThemeTranslationRepository.save(existing)
+                }
+            }
+        }
+    }
+
+    private fun handleSeriesLanguageTranslation(event: LanguageTranslationEvent) {
+        val series = seriesRepository.findByIdOrNull(event.id) ?: return
+        val languageCode = series.languageCode
+        if (languageCode != null) return
+
+        getTranslatableLanguageCodes(languageCode).forEach { locale ->
+            val keywords = series.keywordList
+                .mapNotNull { it.keyword?.tag }
+                .joinToString(", ")
+            val texts = mutableListOf<String>()
+            texts.add(series.title)
+            texts.add(series.introduction)
+            texts.add(keywords)
+
+            val sourceLanguage = series.languageCode ?: "ko"
+
+            val response = translationService.translate(
+                request = TranslateRequest(
+                    texts = texts,
+                    sourceLanguage = sourceLanguage,
+                    targetLanguage = locale
+                )
+            )
+
+            val translatedTexts = response.translatedText
+            if (translatedTexts.size == texts.size) {
+                var index = 0
+                val translatedTitle = translatedTexts[index++]
+                val translatedIntroduction = translatedTexts[index++]
+                val translatedKeywordsJoined = translatedTexts[index]
+
+                val translatedKeywords = translatedKeywordsJoined
+                    .split(",")
+                    .map { it.trim() }
+                    .filter { it.isNotBlank() }
+
+                val payload = SeriesTranslationPayload(
+                    title = translatedTitle,
+                    introduction = translatedIntroduction,
+                    keywords = translatedKeywords
+                )
+
+                val existing = seriesTranslationRepository
+                    .findBySeriesIdAndLocale(series.id!!, locale)
+
+                if (existing == null) {
+                    seriesTranslationRepository.save(
+                        SeriesTranslation(
+                            seriesId = series.id!!,
+                            locale = locale,
+                            renderedPayload = payload
+                        )
+                    )
+                } else {
+                    existing.renderedPayload = payload
+                    seriesTranslationRepository.save(existing)
+                }
+            }
+        }
+    }
+
+    private fun handleSeriesGenreLanguageTranslation(event: LanguageTranslationEvent) {
+        val seriesGenre = seriesGenreRepository.findActiveSeriesGenreById(event.id) ?: return
+
+        val sourceLanguage = "ko"
+        getTranslatableLanguageCodes(sourceLanguage).forEach { locale ->
+            val texts = mutableListOf<String>()
+            texts.add(seriesGenre.genre)
+
+            val response = translationService.translate(
+                request = TranslateRequest(
+                    texts = texts,
+                    sourceLanguage = sourceLanguage,
+                    targetLanguage = locale
+                )
+            )
+
+            val translatedTexts = response.translatedText
+            if (translatedTexts.size == texts.size) {
+                val translatedGenre = translatedTexts[0]
+
+                val existing = seriesGenreTranslationRepository
+                    .findBySeriesGenreIdAndLocale(seriesGenre.id!!, locale)
+
+                if (existing == null) {
+                    seriesGenreTranslationRepository.save(
+                        SeriesGenreTranslation(
+                            seriesGenreId = seriesGenre.id!!,
+                            locale = locale,
+                            genre = translatedGenre
+                        )
+                    )
+                } else {
+                    existing.genre = translatedGenre
+                    seriesGenreTranslationRepository.save(existing)
+                }
+            }
+        }
+    }
+
+    private fun handleOriginalWorkLanguageTranslation(event: LanguageTranslationEvent) {
+        val originalWork = originalWorkRepository.findByIdOrNull(event.id) ?: return
+        val languageCode = originalWork.languageCode
+        if (languageCode != null) return
+
+        /**
+         * handleSeriesLanguageTranslation 참조하여 원작 번역 구현
+         *
+         * originalWorkTranslationRepository
+         *
+         * 번역대상
+         * - title
+         * - contentType
+         * - category
+         * - description
+         * - tags
+         */
+        getTranslatableLanguageCodes(languageCode).forEach { locale ->
+            val tagsJoined = originalWork.tagMappings
+                .mapNotNull { it.tag.tag }
+                .joinToString(", ")
+
+            val texts = mutableListOf<String>()
+            texts.add(originalWork.title)
+            texts.add(originalWork.contentType)
+            texts.add(originalWork.category)
+            texts.add(originalWork.description)
+            texts.add(tagsJoined)
+
+            val sourceLanguage = originalWork.languageCode ?: "ko"
+
+            val response = translationService.translate(
+                request = TranslateRequest(
+                    texts = texts,
+                    sourceLanguage = sourceLanguage,
+                    targetLanguage = locale
+                )
+            )
+
+            val translatedTexts = response.translatedText
+            if (translatedTexts.size == texts.size) {
+                var index = 0
+                val translatedTitle = translatedTexts[index++]
+                val translatedContentType = translatedTexts[index++]
+                val translatedCategory = translatedTexts[index++]
+                val translatedDescription = translatedTexts[index++]
+                val translatedTagsJoined = translatedTexts[index]
+
+                val translatedTags = translatedTagsJoined
+                    .split(",")
+                    .map { it.trim() }
+                    .filter { it.isNotBlank() }
+
+                val payload = OriginalWorkTranslationPayload(
+                    title = translatedTitle,
+                    contentType = translatedContentType,
+                    category = translatedCategory,
+                    description = translatedDescription,
+                    tags = translatedTags
+                )
+
+                val existing = originalWorkTranslationRepository
+                    .findByOriginalWorkIdAndLocale(originalWork.id!!, locale)
+
+                if (existing == null) {
+                    originalWorkTranslationRepository.save(
+                        OriginalWorkTranslation(
+                            originalWorkId = originalWork.id!!,
+                            locale = locale,
+                            renderedPayload = payload
+                        )
+                    )
+                } else {
+                    existing.renderedPayload = payload
+                    originalWorkTranslationRepository.save(existing)
+                }
+            }
+        }
+    }
+}

src/main/kotlin/kr/co/vividnext/sodalive/i18n/translation/PapagoTranslationResponse.kt

@@ -0,0 +1,40 @@
+package kr.co.vividnext.sodalive.i18n.translation
+
+/**
+ * Papago 번역 API 응답 예시
+ *
+ * ```json
+ * {
+ *   "message": {
+ *     "result": {
+ *       "srcLangType": "ko",
+ *       "tarLangType": "en",
+ *       "translatedText": "Hello, I like to eat apple while riding a bicycle."
+ *     }
+ *   }
+ * }
+ * ```
+ */
+
+/**
+ * 위 JSON 구조에 대응하는 최상위 응답 모델
+ */
+data class PapagoTranslationResponse(
+    val message: Message
+) {
+    /**
+     * message 필드 내부 구조
+     */
+    data class Message(
+        val result: Result
+    )
+
+    /**
+     * 실제 번역 결과 데이터
+     */
+    data class Result(
+        val srcLangType: String,
+        val tarLangType: String,
+        val translatedText: String
+    )
+}

src/main/kotlin/kr/co/vividnext/sodalive/i18n/translation/PapagoTranslationService.kt

@@ -0,0 +1,95 @@
+package kr.co.vividnext.sodalive.i18n.translation
+
+import org.springframework.beans.factory.annotation.Value
+import org.springframework.http.HttpEntity
+import org.springframework.http.HttpHeaders
+import org.springframework.http.MediaType
+import org.springframework.stereotype.Service
+import org.springframework.web.client.RestTemplate
+import org.springframework.web.client.postForEntity
+
+@Service
+class PapagoTranslationService(
+    @Value("\${cloud.naver.papago-client-id}")
+    private val papagoClientId: String,
+
+    @Value("\${cloud.naver.papago-client-secret}")
+    private val papagoClientSecret: String
+) {
+    private val restTemplate: RestTemplate = RestTemplate()
+
+    private val papagoTranslateUrl = "https://papago.apigw.ntruss.com/nmt/v1/translation"
+
+    fun translate(request: TranslateRequest): TranslateResult {
+        if (request.texts.isEmpty() || request.sourceLanguage == request.targetLanguage) {
+            return TranslateResult(emptyList())
+        }
+
+        if (!validateLanguages(request.sourceLanguage, request.targetLanguage)) {
+            return TranslateResult(emptyList())
+        }
+
+        val headers = HttpHeaders().apply {
+            contentType = MediaType.APPLICATION_JSON
+            set("X-NCP-APIGW-API-KEY-ID", papagoClientId)
+            set("X-NCP-APIGW-API-KEY", papagoClientSecret)
+        }
+
+        val translatedTexts = mutableListOf<String>()
+
+        request.texts.forEach { text ->
+            try {
+                val body = mapOf(
+                    "source" to request.sourceLanguage,
+                    "target" to request.targetLanguage,
+                    "text" to text
+                )
+
+                val requestEntity = HttpEntity(body, headers)
+
+                val response = restTemplate.postForEntity<PapagoTranslationResponse>(
+                    papagoTranslateUrl,
+                    requestEntity
+                )
+
+                if (!response.statusCode.is2xxSuccessful) {
+                    return@forEach
+                }
+
+                val translated = response.body?.message?.result?.translatedText
+                translatedTexts.add(translated ?: "")
+            } catch (_: Exception) {
+            }
+        }
+
+        return TranslateResult(translatedTexts)
+    }
+
+    private fun validateLanguages(sourceLanguage: String, targetLanguage: String): Boolean {
+        return requireSupportedLanguage(sourceLanguage) && requireSupportedLanguage(targetLanguage)
+    }
+
+    private fun requireSupportedLanguage(language: String): Boolean {
+        val normalized = language.lowercase()
+        return SUPPORTED_LANGUAGE_CODES.contains(normalized)
+    }
+
+    companion object {
+        private val SUPPORTED_LANGUAGE_CODES = setOf(
+            "ko",
+            "en",
+            "ja"
+        )
+
+        /**
+         * 번역 대상 언어 코드 집합을 반환한다.
+         *
+         * @param excludedLanguageCode 번역 대상에서 제외할 언어 코드(대소문자 무시)
+         * @return 지원되는 언어 코드 중 [excludedLanguageCode]를 제외한 집합
+         */
+        fun getTranslatableLanguageCodes(excludedLanguageCode: String?): Set<String> {
+            val normalized = excludedLanguageCode?.lowercase()
+            return SUPPORTED_LANGUAGE_CODES.filterNot { it == normalized }.toSet()
+        }
+    }
+}

src/main/kotlin/kr/co/vividnext/sodalive/i18n/translation/TranslateRequest.kt

@@ -0,0 +1,11 @@
+package kr.co.vividnext.sodalive.i18n.translation
+
+data class TranslateRequest(
+    val texts: List<String>,
+    val sourceLanguage: String,
+    val targetLanguage: String
+)
+
+data class TranslateResult(
+    val translatedText: List<String>
+)

src/main/resources/application.yml

@@ -45,6 +45,9 @@ google:
     webClientId: ${GOOGLE_WEB_CLIENT_ID}
 
 cloud:
+    naver:
+        papagoClientId: ${NCLOUD_PAPAGO_CLIENT_ID}
+        papagoClientSecret: ${NCLOUD_PAPAGO_CLIENT_SECRET}
     aws:
         credentials:
             accessKey: ${APP_AWS_ACCESS_KEY}

work/scripts/check-commit-message-rules.sh

@@ -0,0 +1,71 @@
+#!/bin/bash
+
+# Check if a commit message follows project rules
+# Rules: 50/72 formatting, no advertisements/branding
+# Usage: ./check-commit-message-rules.sh [commit-hash]
+# If no commit-hash is provided, checks the latest commit
+
+# Determine which commit to check
+if [ $# -eq 0 ]; then
+    commit_ref="HEAD"
+    echo "Checking latest commit..."
+else
+    commit_ref="$1"
+    echo "Checking commit: $commit_ref"
+fi
+
+# Get the commit message
+commit_message=$(git log -1 --pretty=format:"%s%n%b" "$commit_ref")
+
+# Split into subject and body
+subject=$(echo "$commit_message" | head -n1)
+body=$(echo "$commit_message" | tail -n +2 | sed '/^$/d')
+
+echo "Checking commit message format..."
+echo "Subject: $subject"
+
+# Check subject line length
+subject_length=${#subject}
+if [ $subject_length -gt 50 ]; then
+    echo "[FAIL] Subject line too long: $subject_length characters (max 50)"
+    exit_code=1
+else
+    echo "[PASS] Subject line length OK: $subject_length characters"
+    exit_code=0
+fi
+
+# Check body line lengths if body exists
+if [ -n "$body" ]; then
+    echo "Checking body line lengths..."
+    while IFS= read -r line; do
+        line_length=${#line}
+        if [ $line_length -gt 72 ]; then
+            echo "[FAIL] Body line too long: $line_length characters (max 72)"
+            echo "Line: $line"
+            exit_code=1
+        fi
+    done <<< "$body"
+
+    if [ $exit_code -eq 0 ]; then
+        echo "[PASS] All body lines within 72 characters"
+    fi
+else
+    echo "[INFO] No body content to check"
+fi
+
+# Check for advertisements, branding, or promotional content
+echo "Checking for advertisements and branding..."
+if echo "$commit_message" | grep -qi "generated with\|claude code\|anthropic\|co-authored-by.*claude\|🤖"; then
+    echo "[FAIL] Commit message contains advertisements, branding, or promotional content"
+    exit_code=1
+else
+    echo "[PASS] No advertisements or branding detected"
+fi
+
+if [ $exit_code -eq 0 ]; then
+    echo "[PASS] Commit message follows all rules"
+else
+    echo "[FAIL] Commit message violates project rules"
+fi
+
+exit $exit_code