diff --git a/engine/types.ts b/engine/types.ts
index 25b5ad7..14ef09b 100644
--- a/engine/types.ts
+++ b/engine/types.ts
@@ -86,7 +86,9 @@ export interface ChapterInfo {
 export interface AchievementDef {
   id: string
   title: string
+  titleKey?: string
   description: string
+  descKey?: string
   icon?: string
   hidden?: boolean
   condition: Condition
diff --git a/public/demo/locales/en.json b/public/demo/locales/en.json
index d5d4d60..2b321f8 100644
--- a/public/demo/locales/en.json
+++ b/public/demo/locales/en.json
@@ -70,5 +70,19 @@
     "trust_end": "Trusted Ally",
     "alone_end": "Lone Path",
     "continue_end": "Keep Moving Forward"
+  },
+  "achievement": {
+    "qte_master": {
+      "title": "Reaction Master",
+      "desc": "Successfully complete a QTE"
+    },
+    "explorer": {
+      "title": "Explorer",
+      "desc": "Search every corner of the room"
+    },
+    "game_finished": {
+      "title": "Completed",
+      "desc": "Complete the game once"
+    }
   }
 }
\ No newline at end of file
diff --git a/public/demo/locales/ja.json b/public/demo/locales/ja.json
index b595004..8be2ca3 100644
--- a/public/demo/locales/ja.json
+++ b/public/demo/locales/ja.json
@@ -65,5 +65,19 @@
     "trust_end": "信頼の仲間",
     "alone_end": "孤独の道",
     "continue_end": "前進を続ける"
+  },
+  "achievement": {
+    "qte_master": {
+      "title": "反射神経の達人",
+      "desc": "QTEを成功させる"
+    },
+    "explorer": {
+      "title": "探索者",
+      "desc": "部屋の隅々まで調べる"
+    },
+    "game_finished": {
+      "title": "クリア達成",
+      "desc": "ゲームを一度クリアする"
+    }
   }
 }
\ No newline at end of file
diff --git a/public/demo/locales/zh.json b/public/demo/locales/zh.json
index fa21524..d3e230c 100644
--- a/public/demo/locales/zh.json
+++ b/public/demo/locales/zh.json
@@ -70,5 +70,19 @@
     "trust_end": "信任的伙伴",
     "alone_end": "独行之路",
     "continue_end": "继续前行"
+  },
+  "achievement": {
+    "qte_master": {
+      "title": "反应达人",
+      "desc": "成功完成一次 QTE"
+    },
+    "explorer": {
+      "title": "探索者",
+      "desc": "搜索过房间的所有角落"
+    },
+    "game_finished": {
+      "title": "通关达成",
+      "desc": "完成一次游戏"
+    }
   }
 }
\ No newline at end of file
diff --git a/public/scenes/demo.json b/public/scenes/demo.json
index b72e9cb..a1ddf5f 100644
--- a/public/scenes/demo.json
+++ b/public/scenes/demo.json
@@ -16,7 +16,9 @@
     {
       "id": "qte_master",
       "title": "反应达人",
+      "titleKey": "achievement.qte_master.title",
       "description": "成功完成一次 QTE",
+      "descKey": "achievement.qte_master.desc",
       "icon": "",
       "hidden": false,
       "condition": { "variable": "qte_succeeded", "op": ">=", "value": 1 }
@@ -24,7 +26,9 @@
     {
       "id": "explorer",
       "title": "探索者",
+      "titleKey": "achievement.explorer.title",
       "description": "搜索过房间的所有角落",
+      "descKey": "achievement.explorer.desc",
       "icon": "",
       "hidden": false,
       "condition": { "variable": "investigation", "op": ">=", "value": 2 }
@@ -32,7 +36,9 @@
     {
       "id": "game_finished",
       "title": "通关达成",
+      "titleKey": "achievement.game_finished.title",
       "description": "完成一次游戏",
+      "descKey": "achievement.game_finished.desc",
       "icon": "",
       "hidden": false,
       "condition": { "variable": "completed_game", "op": ">=", "value": 1 }
diff --git a/src/components/AchievementPanel.vue b/src/components/AchievementPanel.vue
index 50e6567..1e135ab 100644
--- a/src/components/AchievementPanel.vue
+++ b/src/components/AchievementPanel.vue
@@ -1,5 +1,8 @@
 <script setup lang="ts">
 import type { AchievementDef } from '@engine/types'
+import { useI18n } from '@/composables/useI18n'
+
+const { t } = useI18n()
 
 defineProps<{
   definitions: AchievementDef[]
@@ -14,7 +17,7 @@ const emit = defineEmits<{
 <template>
   <div class="ach-overlay" @click.self="emit('close')" @keydown.escape="emit('close')">
     <div class="ach-panel">
-      <h2 class="ach-title">成就</h2>
+      <h2 class="ach-title">{{ t('ui.achievements') }}</h2>
 
       <div class="ach-list">
         <div
@@ -29,16 +32,16 @@ const emit = defineEmits<{
           </div>
           <div class="ach-body">
             <div class="ach-title-text">
-              {{ !unlockedIds.has(ach.id) && ach.hidden ? '???' : ach.title }}
+              {{ !unlockedIds.has(ach.id) && ach.hidden ? '???' : t(ach.titleKey || ach.title) }}
             </div>
             <div class="ach-desc-text">
-              {{ !unlockedIds.has(ach.id) && ach.hidden ? '' : ach.description }}
+              {{ !unlockedIds.has(ach.id) && ach.hidden ? '' : t(ach.descKey || ach.description) }}
             </div>
           </div>
         </div>
       </div>
 
-      <button class="ach-close" @click="emit('close')">关闭</button>
+      <button class="ach-close" @click="emit('close')">{{ t('ui.close') }}</button>
     </div>
   </div>
 </template>
diff --git a/src/components/AchievementToast.vue b/src/components/AchievementToast.vue
index f38c74b..5eea66f 100644
--- a/src/components/AchievementToast.vue
+++ b/src/components/AchievementToast.vue
@@ -1,6 +1,9 @@
 <script setup lang="ts">
 import { computed, watch, ref } from 'vue'
 import type { AchievementDef } from '@engine/types'
+import { useI18n } from '@/composables/useI18n'
+
+const { t } = useI18n()
 
 const props = defineProps<{
   achievementId: string
@@ -32,9 +35,9 @@ watch(() => props.achievementId, (id) => {
       <span v-else class="toast-star">⭐</span>
     </div>
     <div class="toast-body">
-      <div class="toast-label">成就解锁</div>
-      <div class="toast-title">{{ def.title }}</div>
-      <div class="toast-desc">{{ def.description }}</div>
+      <div class="toast-label">{{ t('ui.achievementUnlocked') }}</div>
+      <div class="toast-title">{{ def ? t(def.titleKey || def.title) : '' }}</div>
+      <div class="toast-desc">{{ def ? t(def.descKey || def.description) : '' }}</div>
     </div>
   </div>
 </template>
diff --git a/src/locales/en.json b/src/locales/en.json
index 866ed67..130f182 100644
--- a/src/locales/en.json
+++ b/src/locales/en.json
@@ -24,6 +24,7 @@
     "quitToMenu": "Back to Menu",
     "pauseHint": "Esc = Resume",
     "achievements": "Achievements",
+    "achievementUnlocked": "Achievement Unlocked",
     "gallery": "Gallery",
     "story": "Story Progress",
     "startChapter": "Start",
diff --git a/src/locales/ja.json b/src/locales/ja.json
index b7cdcd9..dba26d5 100644
--- a/src/locales/ja.json
+++ b/src/locales/ja.json
@@ -24,6 +24,7 @@
     "quitToMenu": "メニューに戻る",
     "pauseHint": "Esc = 再開",
     "achievements": "実績",
+    "achievementUnlocked": "実績解除",
     "gallery": "ギャラリー",
     "story": "ストーリー進行",
     "startChapter": "開始",
diff --git a/src/locales/zh.json b/src/locales/zh.json
index c071306..4cd632b 100644
--- a/src/locales/zh.json
+++ b/src/locales/zh.json
@@ -24,6 +24,7 @@
     "quitToMenu": "返回主菜单",
     "pauseHint": "Esc = 继续",
     "achievements": "成就",
+    "achievementUnlocked": "成就解锁",
     "gallery": "画廊",
     "story": "故事进度",
     "startChapter": "开始",