diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/chat/original/controller/OriginalWorkController.kt b/src/main/kotlin/kr/co/vividnext/sodalive/chat/original/controller/OriginalWorkController.kt
index 6efc678..0cfbdef 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/chat/original/controller/OriginalWorkController.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/chat/original/controller/OriginalWorkController.kt
@@ -3,10 +3,12 @@ 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
@@ -34,7 +36,9 @@ class OriginalWorkController(
 
     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
@@ -139,20 +143,56 @@ class OriginalWorkController(
             emptySet()
         }
 
-        ApiResponse.ok(
-            OriginalWorkDetailResponse.from(
-                ow,
-                imageHost,
+        val translatedOriginal = originalWorkTranslationService.ensureTranslated(
+            originalWork = ow,
+            targetLocale = langContext.lang.code
+        )
+
+        /**
+         * 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,
-                        description = it.description,
+                        name = if (hasName) newName else it.name,
+                        description = if (hasDesc) newDesc else it.description,
                         imageUrl = "$imageHost/$path",
                         new = recentSet.contains(it.id)
                     )
                 }
+            }
+        }
+
+        ApiResponse.ok(
+            OriginalWorkDetailResponse.from(
+                ow,
+                imageHost,
+                translatedCharacters,
+                translated = translatedOriginal
             )
         )
     }
diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/chat/original/dto/OriginalWorkAppDtos.kt b/src/main/kotlin/kr/co/vividnext/sodalive/chat/original/dto/OriginalWorkAppDtos.kt
index d1a652d..4b4a29f 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/chat/original/dto/OriginalWorkAppDtos.kt
+++ b/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
             )
         }
     }
diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/chat/original/service/OriginalWorkTranslationService.kt b/src/main/kotlin/kr/co/vividnext/sodalive/chat/original/service/OriginalWorkTranslationService.kt
new file mode 100644
index 0000000..3374997
--- /dev/null
+++ b/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
+        }
+    }
+}
diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/chat/original/translation/OriginalWorkTranslation.kt b/src/main/kotlin/kr/co/vividnext/sodalive/chat/original/translation/OriginalWorkTranslation.kt
index bdc8533..d5d7b9c 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/chat/original/translation/OriginalWorkTranslation.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/chat/original/translation/OriginalWorkTranslation.kt
@@ -35,6 +35,14 @@ data class OriginalWorkTranslationPayload(
     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> {