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/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

@@ -12,6 +12,7 @@ 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
@@ -53,6 +54,7 @@ class HomeService(
 
     private val contentTranslationRepository: ContentTranslationRepository,
     private val aiCharacterTranslationRepository: AiCharacterTranslationRepository,
+    private val seriesTranslationRepository: SeriesTranslationRepository,
 
     private val langContext: LangContext,
 
@@ -133,20 +135,25 @@ 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 translatedPopularCharacters = getTranslatedAiCharacterList(aiCharacterList = characterService.getPopularCharacters())
@@ -280,9 +287,9 @@ class HomeService(
             latestContentList = translatedLatestContentList,
             bannerList = bannerList,
             eventBannerList = eventBannerList,
-            originalAudioDramaList = originalAudioDramaList,
+            originalAudioDramaList = translatedOriginalAudioDramaList,
             auditionList = auditionList,
-            dayOfWeekSeriesList = dayOfWeekSeriesList,
+            dayOfWeekSeriesList = translatedDayOfWeekSeriesList,
             popularCharacters = translatedPopularCharacters,
             contentRanking = translatedContentRanking,
             recommendChannelList = translatedRecommendChannelList,
@@ -341,12 +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(
@@ -479,6 +488,44 @@ class HomeService(
         }
     }
 
+    /**
+     * 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.
      *

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/content/AudioContentController.kt

@@ -108,7 +108,6 @@ class AudioContentController(private val service: AudioContentService) {
         @RequestParam("category-id", required = false) categoryId: Long? = 0,
         @RequestParam("isAdultContentVisible", required = false) isAdultContentVisible: Boolean? = null,
         @RequestParam("contentType", required = false) contentType: ContentType? = null,
-        @RequestParam("languageCode", required = false) languageCode: String? = null,
         @AuthenticationPrincipal(expression = "#this == 'anonymousUser' ? null : member") member: Member?,
         pageable: Pageable
     ) = run {
@@ -121,7 +120,6 @@ class AudioContentController(private val service: AudioContentService) {
                 categoryId = categoryId ?: 0,
                 isAdultContentVisible = isAdultContentVisible ?: true,
                 contentType = contentType ?: ContentType.ALL,
-                languageCode = languageCode,
                 member = member,
                 offset = pageable.offset,
                 limit = pageable.pageSize.toLong()
@@ -133,7 +131,6 @@ class AudioContentController(private val service: AudioContentService) {
     fun getDetail(
         @PathVariable id: Long,
         @RequestParam timezone: String,
-        @RequestParam(required = false) languageCode: String? = null,
         @RequestParam("isAdultContentVisible", required = false) isAdultContentVisible: Boolean? = null,
         @AuthenticationPrincipal(expression = "#this == 'anonymousUser' ? null : member") member: Member?
     ) = run {
@@ -144,8 +141,7 @@ class AudioContentController(private val service: AudioContentService) {
                 id = id,
                 member = member,
                 isAdultContentVisible = isAdultContentVisible ?: true,
-                timezone = timezone,
+                timezone = timezone
-                languageCode = languageCode
             )
         )
     }
@@ -243,7 +239,6 @@ class AudioContentController(private val service: AudioContentService) {
 
     @GetMapping("/all")
     fun getAllContents(
-        @RequestParam("languageCode", required = false) languageCode: String? = null,
         @RequestParam("isAdultContentVisible", required = false) isAdultContentVisible: Boolean? = null,
         @RequestParam("contentType", required = false) contentType: ContentType? = null,
         @RequestParam("isFree", required = false) isFree: Boolean? = null,
@@ -264,8 +259,7 @@ class AudioContentController(private val service: AudioContentService) {
                 sortType = sortType ?: SortType.NEWEST,
                 isFree = isFree ?: false,
                 isAdult = (isAdultContentVisible ?: true) && member.auth != null,
-                isPointAvailableOnly = isPointAvailableOnly ?: false,
+                isPointAvailableOnly = isPointAvailableOnly ?: false
-                languageCode = languageCode
             )
         )
     }

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

@@ -21,6 +21,7 @@ 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
@@ -29,6 +30,7 @@ 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
@@ -72,6 +74,10 @@ class AudioContentService(
     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,
 
@@ -366,14 +372,14 @@ class AudioContentService(
                     query = papagoQuery
                 )
             )
-        }
+        } else {
-
+            applicationEventPublisher.publishEvent(
-        applicationEventPublisher.publishEvent(
+                LanguageTranslationEvent(
-            LanguageTranslationEvent(
+                    id = audioContent.id!!,
-                id = audioContent.id!!,
+                    targetType = LanguageTranslationTargetType.CONTENT
-                targetType = LanguageTranslationTargetType.CONTENT
+                )
             )
-        )
+        }
 
         return CreateAudioContentResponse(contentId = audioContent.id!!)
     }
@@ -526,8 +532,7 @@ class AudioContentService(
         id: Long,
         member: Member,
         isAdultContentVisible: Boolean,
-        timezone: String,
+        timezone: String
-        languageCode: String?
     ): GetAudioContentDetailResponse {
         val isAdult = member.auth != null && isAdultContentVisible
 
@@ -764,13 +769,10 @@ class AudioContentService(
         if (
             audioContent.languageCode != null &&
             audioContent.languageCode!!.isNotBlank() &&
-            !languageCode.isNullOrBlank() &&
+            audioContent.languageCode != langContext.lang.code
-            audioContent.languageCode != languageCode
         ) {
-            val locale = languageCode.lowercase()
-
             val existing = contentTranslationRepository
-                .findByContentIdAndLocale(audioContent.id!!, locale)
+                .findByContentIdAndLocale(audioContent.id!!, langContext.lang.code)
 
             if (existing != null) {
                 val payload = existing.renderedPayload
@@ -791,7 +793,7 @@ class AudioContentService(
                     request = TranslateRequest(
                         texts = texts,
                         sourceLanguage = sourceLanguage,
-                        targetLanguage = locale
+                        targetLanguage = langContext.lang.code
                     )
                 )
 
@@ -812,7 +814,7 @@ class AudioContentService(
                     contentTranslationRepository.save(
                         ContentTranslation(
                             contentId = audioContent.id!!,
-                            locale = locale,
+                            locale = langContext.lang.code,
                             renderedPayload = payload
                         )
                     )
@@ -826,6 +828,22 @@ class AudioContentService(
             }
         }
 
+        /**
+         * 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,
@@ -833,7 +851,7 @@ class AudioContentService(
             languageCode = audioContent.languageCode,
             coverImageUrl = "$coverImageHost/${audioContent.coverImage!!}",
             contentUrl = audioContentUrl,
-            themeStr = audioContent.theme!!.theme,
+            themeStr = themeStrTranslated,
             tag = tag,
             price = audioContent.price,
             duration = audioContent.duration ?: "",
@@ -928,7 +946,6 @@ class AudioContentService(
         categoryId: Long = 0,
         isAdultContentVisible: Boolean,
         contentType: ContentType,
-        languageCode: String?,
         offset: Long,
         limit: Long
     ): GetAudioContentListResponse {
@@ -982,24 +999,19 @@ class AudioContentService(
                 it
             }
 
-        val translatedContentList = if (!languageCode.isNullOrBlank()) {
+        val contentIds = items.map { it.contentId }
-            val contentIds = items.map { it.contentId }
+        val translatedContentList = if (contentIds.isNotEmpty()) {
+            val translations = contentTranslationRepository
+                .findByContentIdInAndLocale(contentIds = contentIds, locale = langContext.lang.code)
+                .associateBy { it.contentId }
 
-            if (contentIds.isNotEmpty()) {
+            items.map { item ->
-                val translations = contentTranslationRepository
+                val translatedTitle = translations[item.contentId]?.renderedPayload?.title
-                    .findByContentIdInAndLocale(contentIds = contentIds, locale = languageCode)
+                if (translatedTitle.isNullOrBlank()) {
-                    .associateBy { it.contentId }
+                    item
-
+                } else {
-                items.map { item ->
+                    item.copy(title = translatedTitle)
-                    val translatedTitle = translations[item.contentId]?.renderedPayload?.title
-                    if (translatedTitle.isNullOrBlank()) {
-                        item
-                    } else {
-                        item.copy(title = translatedTitle)
-                    }
                 }
-            } else {
-                items
             }
         } else {
             items
@@ -1145,11 +1157,22 @@ class AudioContentService(
         isFree: Boolean = false,
         isAdult: Boolean = false,
         orderByRandom: Boolean = false,
-        isPointAvailableOnly: Boolean = false,
+        isPointAvailableOnly: Boolean = false
-        languageCode: String? = null
     ): List<AudioContentMainItem> {
+        /**
+         * - 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 = theme,
+            theme = normalizedTheme,
             contentType = contentType,
             offset = offset,
             limit = limit,
@@ -1160,27 +1183,78 @@ class AudioContentService(
             isPointAvailableOnly = isPointAvailableOnly
         )
 
-        return if (!languageCode.isNullOrBlank()) {
+        val contentIds = contentList.map { it.contentId }
-            val contentIds = contentList.map { it.contentId }
+        return if (contentIds.isNotEmpty()) {
+            val translations = contentTranslationRepository
+                .findByContentIdInAndLocale(contentIds = contentIds, locale = langContext.lang.code)
+                .associateBy { it.contentId }
 
-            if (contentIds.isNotEmpty()) {
+            contentList.map { item ->
-                val translations = contentTranslationRepository
+                val translatedTitle = translations[item.contentId]?.renderedPayload?.title
-                    .findByContentIdInAndLocale(contentIds = contentIds, locale = languageCode)
+                if (translatedTitle.isNullOrBlank()) {
-                    .associateBy { it.contentId }
+                    item
-
+                } else {
-                contentList.map { item ->
+                    item.copy(title = translatedTitle)
-                    val translatedTitle = translations[item.contentId]?.renderedPayload?.title
-                    if (translatedTitle.isNullOrBlank()) {
-                        item
-                    } else {
-                        item.copy(title = translatedTitle)
-                    }
                 }
-            } else {
-                contentList
             }
         } 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/LanguageDetectEvent.kt

@@ -2,13 +2,16 @@ 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
@@ -29,7 +32,9 @@ enum class LanguageDetectTargetType {
     COMMENT,
     CHARACTER,
     CHARACTER_COMMENT,
-    CREATOR_CHEERS
+    CREATOR_CHEERS,
+    SERIES,
+    ORIGINAL_WORK
 }
 
 class LanguageDetectEvent(
@@ -49,6 +54,8 @@ class LanguageDetectListener(
     private val chatCharacterRepository: ChatCharacterRepository,
     private val characterCommentRepository: CharacterCommentRepository,
     private val creatorCheersRepository: CreatorCheersRepository,
+    private val seriesRepository: ContentSeriesRepository,
+    private val originalWorkRepository: OriginalWorkRepository,
 
     private val applicationEventPublisher: ApplicationEventPublisher,
 
@@ -80,6 +87,8 @@ class LanguageDetectListener(
             LanguageDetectTargetType.CHARACTER -> handleCharacterLanguageDetect(event)
             LanguageDetectTargetType.CHARACTER_COMMENT -> handleCharacterCommentLanguageDetect(event)
             LanguageDetectTargetType.CREATOR_CHEERS -> handleCreatorCheersLanguageDetect(event)
+            LanguageDetectTargetType.SERIES -> handleSeriesLanguageDetect(event)
+            LanguageDetectTargetType.ORIGINAL_WORK -> handleOriginalWorkLanguageDetect(event)
         }
     }
 
@@ -255,6 +264,83 @@ class LanguageDetectListener(
         )
     }
 
+    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 {

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

@@ -100,7 +100,6 @@ class AudioContentMainController(
     @GetMapping("/new/all")
     fun getNewContentAllByTheme(
         @RequestParam("theme") theme: String,
-        @RequestParam("languageCode", required = false) languageCode: String? = null,
         @RequestParam("isAdultContentVisible", required = false) isAdultContentVisible: Boolean? = null,
         @RequestParam("contentType", required = false) contentType: ContentType? = null,
         @AuthenticationPrincipal(expression = "#this == 'anonymousUser' ? null : member") member: Member?,
@@ -113,7 +112,6 @@ class AudioContentMainController(
                 theme = theme,
                 isAdultContentVisible = isAdultContentVisible ?: true,
                 contentType = contentType ?: ContentType.ALL,
-                languageCode = languageCode,
                 member = member,
                 pageable = pageable
             )

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

@@ -6,8 +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
@@ -21,16 +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)
@@ -60,12 +80,15 @@ class AudioContentMainService(
         theme: String,
         isAdultContentVisible: Boolean,
         contentType: ContentType,
-        languageCode: String?,
         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
@@ -74,6 +97,12 @@ class AudioContentMainService(
             listOf(theme)
         }
 
+        val themeList = normalizeThemeForQuery(
+            themes = themeListRaw,
+            contentType = contentType,
+            isAdult = isAdult
+        )
+
         val totalCount = repository.totalCountNewContentFor2Weeks(
             themeList,
             memberId = member.id!!,
@@ -91,24 +120,19 @@ class AudioContentMainService(
         )
             .filter { !blockMemberRepository.isBlocked(blockedMemberId = member.id!!, memberId = it.creatorId) }
 
-        val translatedContentList = if (!languageCode.isNullOrBlank()) {
+        val contentIds = contentList.map { it.contentId }
-            val contentIds = contentList.map { it.contentId }
+        val translatedContentList = if (contentIds.isNotEmpty()) {
+            val translations = contentTranslationRepository
+                .findByContentIdInAndLocale(contentIds = contentIds, locale = langContext.lang.code)
+                .associateBy { it.contentId }
 
-            if (contentIds.isNotEmpty()) {
+            contentList.map { item ->
-                val translations = contentTranslationRepository
+                val translatedTitle = translations[item.contentId]?.renderedPayload?.title
-                    .findByContentIdInAndLocale(contentIds = contentIds, locale = languageCode)
+                if (translatedTitle.isNullOrBlank()) {
-                    .associateBy { it.contentId }
+                    item
-
+                } else {
-                contentList.map { item ->
+                    item.copy(title = translatedTitle)
-                    val translatedTitle = translations[item.contentId]?.renderedPayload?.title
-                    if (translatedTitle.isNullOrBlank()) {
-                        item
-                    } else {
-                        item.copy(title = translatedTitle)
-                    }
                 }
-            } else {
-                contentList
             }
         } else {
             contentList
@@ -117,6 +141,56 @@ class AudioContentMainService(
         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)
     @Cacheable(cacheNames = ["default"], key = "'newContentUploadCreatorList:' + #memberId + ':' + #isAdult")
     fun getNewContentUploadCreatorList(memberId: Long, isAdult: Boolean): List<ContentCreatorResponse> {

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/AudioContentThemeQueryRepository.kt

@@ -15,6 +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(
@@ -88,6 +92,69 @@ class AudioContentThemeQueryRepository(
         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? {
         return queryFactory
             .selectFrom(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
@@ -12,26 +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/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/ExplorerController.kt

@@ -52,7 +52,6 @@ class ExplorerController(private val service: ExplorerService) {
     fun getCreatorProfile(
         @PathVariable("id") creatorId: Long,
         @RequestParam timezone: String,
-        @RequestParam("languageCode", required = false) languageCode: String? = null,
         @RequestParam("isAdultContentVisible", required = false) isAdultContentVisible: Boolean? = null,
         @AuthenticationPrincipal(expression = "#this == 'anonymousUser' ? null : member") member: Member?
     ) = run {
@@ -61,7 +60,6 @@ class ExplorerController(private val service: ExplorerService) {
             service.getCreatorProfile(
                 creatorId = creatorId,
                 timezone = timezone,
-                languageCode = languageCode,
                 isAdultContentVisible = isAdultContentVisible ?: true,
                 member = member
             )

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

@@ -19,6 +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
@@ -49,6 +50,8 @@ class ExplorerService(
     private val applicationEventPublisher: ApplicationEventPublisher,
     private val contentTranslationRepository: ContentTranslationRepository,
 
+    private val langContext: LangContext,
+
     @Value("\${cloud.aws.cloud-front.host}")
     private val cloudFrontHost: String
 ) {
@@ -172,7 +175,6 @@ class ExplorerService(
     fun getCreatorProfile(
         creatorId: Long,
         timezone: String,
-        languageCode: String?,
         isAdultContentVisible: Boolean,
         member: Member
     ): GetCreatorProfileResponse {
@@ -227,7 +229,6 @@ class ExplorerService(
                 sortType = SortType.NEWEST,
                 isAdultContentVisible = isAdultContentVisible,
                 contentType = ContentType.ALL,
-                languageCode = null,
                 member = member,
                 offset = 0,
                 limit = 3
@@ -236,24 +237,19 @@ class ExplorerService(
             listOf()
         }
 
-        val translatedContentList = if (!languageCode.isNullOrBlank() && contentList.isNotEmpty()) {
+        val contentIds = contentList.map { it.contentId }
-            val contentIds = contentList.map { it.contentId }
+        val translatedContentList = if (contentIds.isNotEmpty()) {
+            val translations = contentTranslationRepository
+                .findByContentIdInAndLocale(contentIds = contentIds, locale = langContext.lang.code)
+                .associateBy { it.contentId }
 
-            if (contentIds.isNotEmpty()) {
+            contentList.map { item ->
-                val translations = contentTranslationRepository
+                val translatedTitle = translations[item.contentId]?.renderedPayload?.title
-                    .findByContentIdInAndLocale(contentIds = contentIds, locale = languageCode)
+                if (translatedTitle.isNullOrBlank()) {
-                    .associateBy { it.contentId }
+                    item
-
+                } else {
-                contentList.map { item ->
+                    item.copy(title = translatedTitle)
-                    val translatedTitle = translations[item.contentId]?.renderedPayload?.title
-                    if (translatedTitle.isNullOrBlank()) {
-                        item
-                    } else {
-                        item.copy(title = translatedTitle)
-                    }
                 }
-            } else {
-                contentList
             }
         } else {
             contentList

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

@@ -1,12 +1,26 @@
 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
@@ -21,7 +35,13 @@ import org.springframework.transaction.event.TransactionalEventListener
 
 enum class LanguageTranslationTargetType {
     CONTENT,
-    CHARACTER
+    CHARACTER,
+    CONTENT_THEME,
+
+    SERIES,
+    SERIES_GENRE,
+
+    ORIGINAL_WORK
 }
 
 class LanguageTranslationEvent(
@@ -33,9 +53,17 @@ class LanguageTranslationEvent(
 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
 ) {
@@ -46,6 +74,10 @@ class LanguageTranslationListener(
         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)
         }
     }
 
@@ -202,4 +234,223 @@ class LanguageTranslationListener(
             }
         }
     }
+
+    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/PapagoTranslationService.kt

@@ -6,6 +6,7 @@ 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(
@@ -46,10 +47,9 @@ class PapagoTranslationService(
 
                 val requestEntity = HttpEntity(body, headers)
 
-                val response = restTemplate.postForEntity(
+                val response = restTemplate.postForEntity<PapagoTranslationResponse>(
                     papagoTranslateUrl,
-                    requestEntity,
+                    requestEntity
-                    PapagoTranslationResponse::class.java
                 )
 
                 if (!response.statusCode.is2xxSuccessful) {