diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/member/MemberService.kt b/src/main/kotlin/kr/co/vividnext/sodalive/member/MemberService.kt
index e92fdc3a..d6868bd0 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/member/MemberService.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/member/MemberService.kt
@@ -130,7 +130,7 @@ class MemberService(
         duplicateCheckEmail(request.email)
         validatePassword(request.password)
 
-        val nickname = nicknameGenerateService.generateUniqueNickname()
+        val nickname = nicknameGenerateService.generateUniqueNickname(langContext.lang)
         val member = Member(
             email = request.email,
             password = passwordEncoder.encode(request.password),
@@ -850,7 +850,7 @@ class MemberService(
         val email = googleUserInfo.email
         checkEmail(email)
 
-        val nickname = nicknameGenerateService.generateUniqueNickname()
+        val nickname = nicknameGenerateService.generateUniqueNickname(langContext.lang)
         val member = Member(
             googleId = googleUserInfo.sub,
             email = email,
@@ -907,7 +907,7 @@ class MemberService(
         val email = kakaoUserInfo.email
         checkEmail(email)
 
-        val nickname = nicknameGenerateService.generateUniqueNickname()
+        val nickname = nicknameGenerateService.generateUniqueNickname(langContext.lang)
         val member = Member(
             kakaoId = kakaoUserInfo.id,
             email = email,
@@ -964,7 +964,7 @@ class MemberService(
         val email = appleUserInfo.email
         checkEmail(email)
 
-        val nickname = nicknameGenerateService.generateUniqueNickname()
+        val nickname = nicknameGenerateService.generateUniqueNickname(langContext.lang)
         val member = Member(
             appleId = appleUserInfo.sub,
             email = email,
@@ -1021,7 +1021,7 @@ class MemberService(
         val email = lineUserInfo.email
         checkEmail(email)
 
-        val nickname = nicknameGenerateService.generateUniqueNickname()
+        val nickname = nicknameGenerateService.generateUniqueNickname(langContext.lang)
         val member = Member(
             lineId = lineUserInfo.sub,
             email = email,
diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/member/nickname/NicknameGenerateService.kt b/src/main/kotlin/kr/co/vividnext/sodalive/member/nickname/NicknameGenerateService.kt
index 963a8d40..1a0e90e1 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/member/nickname/NicknameGenerateService.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/member/nickname/NicknameGenerateService.kt
@@ -1,6 +1,7 @@
 package kr.co.vividnext.sodalive.member.nickname
 
 import kr.co.vividnext.sodalive.common.SodaException
+import kr.co.vividnext.sodalive.i18n.Lang
 import kr.co.vividnext.sodalive.member.MemberRepository
 import org.springframework.stereotype.Service
 import kotlin.random.Random
@@ -44,23 +45,85 @@ class NicknameGenerateService(private val repository: MemberRepository) {
         "천혜향", "레드향", "금귤", "모과", "비파", "대추", "밤", "호두", "잣", "은행"
     )
 
-    private fun generateRandomNickname(): String {
+    private val jaAdjectives = listOf(
+        "元気な", "明るい", "優しい", "強い", "賢い", "穏やかな", "爽やかな", "楽しい",
+        "勇敢な", "素敵な", "可愛い", "美しい", "清らかな", "温かい", "輝く", "華やかな",
+        "凛とした", "朗らかな", "逞しい", "麗しい", "雅な", "粋な", "健やかな", "晴れやかな",
+        "鮮やかな", "煌めく", "微笑む", "誠実な", "丁寧な", "真っ直ぐな", "気高い", "聡明な",
+        "快活な", "軽やかな", "しなやかな", "伸びやかな", "瑞々しい", "初々しい", "艶やかな", "柔らかな",
+        "澄んだ", "静かな", "豊かな", "深い", "広い", "高い", "清い", "涼しい",
+        "眩しい", "暖かな", "和やかな", "安らかな", "のどかな", "ほがらかな", "すこやかな", "たくましい",
+        "ひたむきな", "まめな", "きらきらな", "ふわふわな", "にこにこな", "わくわくな", "すくすくな", "のびのびな",
+        "きりっとした", "はきはきな", "てきぱきな", "しっかりな", "どっしりな", "ゆったりな", "さっぱりな", "すっきりな",
+        "ぴかぴかな", "つやつやな", "さらさらな", "もちもちな", "ぷるぷるな", "ころころな", "ぽかぽかな", "そよそよな",
+        "堅実な", "勤勉な", "忠実な", "素直な", "謙虚な", "大胆な", "情熱的な", "積極的な",
+        "独創的な", "繊細な", "壮大な", "格調高い", "品のある", "風格ある", "趣のある", "奥深い",
+        "颯爽とした", "堂々とした", "悠々とした", "泰然とした", "毅然とした", "端正な", "清楚な", "典雅な",
+        "俊敏な", "機敏な", "敏捷な", "軽快な", "活発な", "溌剌とした", "生き生きな", "伸び伸びな",
+        "揺るぎない", "確かな", "頼もしい", "心強い", "力強い", "逞しき", "雄々しい", "凜々しい",
+        "慈しみの", "思いやりの", "気配りの", "心優しい", "情け深い", "懐の深い", "器の大きい", "包容力の"
+    )
+
+    private val jaNouns = listOf(
+        "うさぎ", "ねこ", "いぬ", "たぬき", "きつね", "しか", "りす", "ふくろう",
+        "つばめ", "すずめ", "ひばり", "うぐいす", "めじろ", "つる", "はと", "かもめ",
+        "いるか", "くじら", "らっこ", "ペンギン", "コアラ", "パンダ", "アルパカ", "ハムスター",
+        "かめ", "かえる", "ほたる", "ちょう", "とんぼ", "てんとう", "こねこ", "こいぬ",
+        "ひよこ", "こじか", "こぐま", "こうさぎ", "こりす", "こだぬき", "こぎつね", "こばと",
+        "さくら", "うめ", "もみじ", "つばき", "すみれ", "たんぽぽ", "ひまわり", "あじさい",
+        "コスモス", "ラベンダー", "チューリップ", "カーネーション", "バラ", "ユリ", "ダリア", "マーガレット",
+        "なでしこ", "あやめ", "ききょう", "はぎ", "ふじ", "ぼたん", "しゃくやく", "れんげ",
+        "ルビー", "サファイア", "エメラルド", "アメジスト", "パール", "オパール", "トパーズ", "ガーネット",
+        "ひかり", "そら", "うみ", "かぜ", "つき", "ほし", "にじ", "ゆめ",
+        "あかね", "みずき", "はるか", "あおい", "ひなた", "こはる", "いろは", "かなで",
+        "しずく", "つゆ", "あられ", "みぞれ", "こはく", "あかり", "ともしび", "かがやき",
+        "やまと", "みやび", "まこと", "ちはや", "あさひ", "ゆうひ", "あけぼの", "たそがれ",
+        "わかば", "あおば", "もえぎ", "ときわ", "さつき", "やよい", "きさらぎ", "むつき",
+        "抹茶", "桜餅", "団子", "大福", "最中", "羊羹", "煎餅", "饅頭",
+        "柚子", "梅干し", "味噌", "醤油", "わさび", "生姜", "山椒", "昆布",
+        "風鈴", "提灯", "扇子", "千鶴", "折鶴", "手毬", "万華鏡", "花火",
+        "雪うさぎ", "だるま", "こけし", "招き猫", "風車", "独楽", "竹とんぼ", "紙風船",
+        "朝露", "夕凪", "木漏れ日", "花吹雪", "月明かり", "星空", "天の川", "春風",
+        "小春日和", "花曇り", "薄紅", "若草", "深緑", "紺碧", "茜色", "藤色"
+    )
+
+    private fun getAdjectives(lang: Lang): List<String> = when (lang) {
+        Lang.JA -> jaAdjectives
+        else -> adjectives
+    }
+
+    private fun getNouns(lang: Lang): List<String> = when (lang) {
+        Lang.JA -> jaNouns
+        else -> nouns
+    }
+
+    private fun getParticle(lang: Lang): String = when (lang) {
+        Lang.JA -> "の"
+        else -> "의"
+    }
+
+    private fun generateRandomNickname(lang: Lang): String {
+        val adj = getAdjectives(lang)
+        val noun = getNouns(lang)
+        val particle = getParticle(lang)
         val formatType = Random.nextInt(3)
         return when (formatType) {
-            0 -> "${adjectives.random()}${nouns.random()}"
-            1 -> "${nouns.random()}의${nouns.random()}"
-            else -> "${adjectives.random()}${nouns.random()}의${nouns.random()}"
+            0 -> "${adj.random()}${noun.random()}"
+            1 -> "${noun.random()}${particle}${noun.random()}"
+            else -> "${adj.random()}${noun.random()}${particle}${noun.random()}"
         }
     }
 
-    private fun generateNonConflictingNickname(usedNicknames: Set<String>): String {
-        val usedNicknameSet = HashSet(usedNicknames) // 해시셋으로 변환 (O(1) 조회 가능)
+    private fun generateNonConflictingNickname(usedNicknames: Set<String>, lang: Lang): String {
+        val usedNicknameSet = HashSet(usedNicknames)
         val availableNumbers = (1000..9999).shuffled()
+        val adj = getAdjectives(lang)
+        val noun = getNouns(lang)
 
-        for (num in availableNumbers) { // 숫자를 먼저 결정 (무작위)
-            for (adj in adjectives.shuffled()) { // 형용사 순서 랜덤화
-                for (noun in nouns.shuffled()) { // 명사 순서 랜덤화
-                    val candidate = "$adj$noun$num"
+        for (num in availableNumbers) {
+            for (a in adj.shuffled()) {
+                for (n in noun.shuffled()) {
+                    val candidate = "$a$n$num"
                     if (!usedNicknameSet.contains(candidate)) {
                         return candidate
                     }
@@ -70,13 +133,13 @@ class NicknameGenerateService(private val repository: MemberRepository) {
         throw SodaException(messageKey = "member.signup.failed_retry")
     }
 
-    fun generateUniqueNickname(): String {
+    fun generateUniqueNickname(lang: Lang = Lang.KO): String {
         repeat(5) {
-            val candidates = (1..10).map { generateRandomNickname() }
+            val candidates = (1..10).map { generateRandomNickname(lang) }
             val available = candidates.firstOrNull { !repository.existsByNickname(it) }
             if (available != null) return available
         }
 
-        return generateNonConflictingNickname(repository.findNicknamesWithPrefix("").toSet())
+        return generateNonConflictingNickname(repository.findNicknamesWithPrefix("").toSet(), lang)
     }
 }