diff --git a/ROADMAP.md b/ROADMAP.md
index 0b55ac1..3ed9d9c 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -568,11 +568,63 @@ GainNode 的 ramp 目标值 = `Math.min(bgmVolume, bgmDuckLevel × bgmVolume)`
 
 ### P10b 手柄导航（远期 P10b）— 见 FUTURE.md
 
-### P11 多语言字幕（待实现）
+### P11 完整 i18n — 字幕 + UI 国际化，自制 useI18n ✅ 已完成 2026-06-09
 
-目标：支持多语言字幕切换，UI 文本国际化，同一个场景可有中/英/日等多个字幕文件。
+目标：字幕和完整 UI 文本（选项、按钮、标签）支持多语言切换。使用自制 `useI18n()` 组合式函数，
+零依赖，通过静态 import JSON 翻译文件实现。语言切换入口在主菜单和游戏内顶部栏两处。
 
-**数据结构设计：**
+**技术选型：自制 useI18n（~25 行 TS），不用 vue-i18n。**
+
+无需 npm 包，`t(key)` 从静态 import 的 JSON 中按路径查找翻译文本，
+`currentLang` 持久化到 localStorage，跨会话保持。
+
+**架构分层：**
+
+```
+UI 层 (Vue)
+  ├── useI18n.ts         t(key), currentLang, setLang(lang)
+  ├── LangSwitch.vue      "中文 / English" 按钮组
+  ├── locales/zh.json     中文翻译（UI + scene 文本 ~50行）
+  ├── locales/en.json     英文翻译（UI + scene 文本 ~50行）
+  ├── 各组件 t('key')     按钮/提示/标签翻译
+  └── Subtitles.vue       按 currentLang 加载 subtitles[lang]
+
+数据层 (Engine / Scene JSON)
+  ├── Choice.textKey       可选 i18n key，缺省 fallback 到 text
+  ├── SceneNode.subtitles  Record<lang, url> 字幕多语言 map
+  └── 引擎不感知 i18n      纯数据传递，翻译在 composable 层完成
+```
+
+**核心 composable 设计：**
+
+```typescript
+// src/composables/useI18n.ts
+const messages = { zh, en }
+const currentLang = ref(localStorage.getItem('lang') || 'zh')
+
+export function useI18n() {
+  function t(key: string): string { /* key = "ui.start" → messages[lang].ui.start */ }
+  function setLang(lang: string) { /* localStorage + currentLang */ }
+  return { t, currentLang, setLang }
+}
+```
+
+**Choice 翻译策略：**
+
+composable 在 `choiceRequest` 事件中调用 `t(textKey)` 翻译选项文字后存入 store。
+`textKey` 未设置时 fallback 到 `text`（向后兼容，不要求每个 Choice 都加 key）。
+
+```typescript
+engine.on('choiceRequest', (choiceList) => {
+  const translated = choiceList.map(c => ({
+    ...c,
+    text: c.textKey ? i18n.t(c.textKey) : c.text,
+  }))
+  store.setChoices(translated)
+})
+```
+
+**场景数据变更：**
 
 ```json
 {
@@ -580,22 +632,71 @@ GainNode 的 ramp 目标值 = `Math.min(bgmVolume, bgmDuckLevel × bgmVolume)`
   "videoUrl": "/videos/intro.mp4",
   "subtitles": {
     "zh": "/subtitles/intro_zh.vtt",
-    "en": "/subtitles/intro_en.vtt",
-    "ja": "/subtitles/intro_ja.vtt"
+    "en": "/subtitles/intro_en.vtt"
   },
-  "choices": [...]
+  "choices": [
+    {
+      "text": "走向左边那扇发光的门",
+      "textKey": "scene.intro.choice.left_door",
+      "targetScene": "left_door"
+    }
+  ]
+}
+```
+
+**翻译文件结构：**
+
+```json
+// src/locales/zh.json
+{
+  "ui": {
+    "start": "开始",
+    "resume": "继续上次进度",
+    "chapters": "章节选择",
+    "menu": "菜单",
+    "save": "保存",
+    "load": "读取",
+    "close": "关闭",
+    "skip": "跳过",
+    "fullscreen": "全屏",
+    "exitFullscreen": "退出全屏",
+    "gameEnd": "结束",
+    "choose": "做出你的选择",
+    "back": "返回",
+    "autoSave": "自动存档",
+    "empty": "空",
+    "loading": "加载中..."
+  },
+  "scene": {
+    "intro": {
+      "choice": {
+        "left_door": "走向左边那扇发光的门",
+        "right_door": "走向右边那扇普通的门",
+        "search": "搜索房间",
+        "stay": "留在原地，什么也不做"
+      }
+    }
+  }
 }
 ```
 
 **实现清单：**
 
-- [ ] `engine/types.ts` — `SceneNode.subtitles` 改为 `Record<lang, url>`，`Choice.text` 支持多语言 key
-- [ ] `engine/systems/I18nSystem.ts` — 语言切换、当前语言持久化到 localStorage
-- [ ] `src/components/Subtitles.vue` — 监听语言切换，动态加载对应 VTT
-- [ ] `src/components/ChoicePanel.vue` — 选项文字支持 i18n 映射
-- [ ] `src/components/LanguageSwitch.vue` — 语言选择下拉菜单（顶部或菜单中）
-- [ ] `public/scenes/demo.json` — 中英双语字幕示例
-- [ ] 验证：语言切换后字幕/UI 即时更新、刷新保持语言偏好
+- [x] `src/composables/useI18n.ts` — `t(key)`, `currentLang`, `setLang(lang)`, localStorage 持久化
+- [x] `src/locales/zh.json` — 中文翻译（UI ~20 项 + scene 选项文字 ~30 项）
+- [x] `src/locales/en.json` — 英文翻译（同结构）
+- [x] `engine/types.ts` — `Choice.textKey?: string`；`SceneNode.subtitles?: Record<string, string>`
+- [x] `src/composables/useGameEngine.ts` — `choiceRequest` 中 `t(textKey)` 翻译后存入 store
+- [x] `src/components/LangSwitch.vue` — "中文 / English" 切换按钮组，调用 `setLang`
+- [x] `src/components/Subtitles.vue` — `effectiveUrl` computed 优先 `subtitles[lang]`，fallback `subtitleUrl`
+- [x] `src/App.vue` — 主菜单 LangSwitch + 顶部栏按钮 `t()` 翻译
+- [x] `src/components/ChoicePanel.vue` — `t('ui.choose')` 替代硬编码提示文字
+- [x] `src/components/SaveLoadMenu.vue` — 8 处文本用 `t()` 翻译
+- [x] `src/components/ChapterSelect.vue` — 标题 + 返回按钮用 `t()` 翻译
+- [x] `src/components/PlaybackBar.vue` — 跳过按钮用 `t('ui.skip')`
+- [x] `public/subtitles/*_en.vtt` — 3 个英文版字幕文件（intro/left_door/stay）
+- [x] `public/scenes/demo.json` — intro 场景配置 `subtitles` map + 4 个 choice 添加 `textKey`
+- [x] 验证：TypeScript + Vite build 通过
 
 ### P12 场景过渡特效（待实现）
 
diff --git a/engine/types.ts b/engine/types.ts
index 7fd7c71..3634474 100644
--- a/engine/types.ts
+++ b/engine/types.ts
@@ -4,6 +4,7 @@ export interface SceneNode {
   videoUrl: string
   imageUrl?: string
   subtitleUrl?: string
+  subtitles?: Record<string, string>
   choices?: Choice[]
   hotspots?: Hotspot[]
   qte?: QTEDefinition
@@ -22,6 +23,7 @@ export interface SceneNode {
 
 export interface Choice {
   text: string
+  textKey?: string
   targetScene: string
   conditions?: Condition[]
   effects?: Effect[]
diff --git a/public/scenes/demo.json b/public/scenes/demo.json
index 90718b9..15c7700 100644
--- a/public/scenes/demo.json
+++ b/public/scenes/demo.json
@@ -33,6 +33,10 @@
       "id": "intro",
       "videoUrl": "/videos/intro.mp4",
       "subtitleUrl": "/subtitles/intro.vtt",
+      "subtitles": {
+        "zh": "/subtitles/intro.vtt",
+        "en": "/subtitles/intro_en.vtt"
+      },
       "bgmUrl": "/audio/calm_bgm.mp3",
       "bgmVolume": 0.6,
       "bgmCrossFade": 1.5,
@@ -40,6 +44,7 @@
       "choices": [
         {
           "text": "走向左边那扇发光的门",
+          "textKey": "scene.intro.choice.left_door",
           "targetScene": "left_door",
           "effects": [
             { "type": "add", "target": "courage", "value": 10 }
@@ -47,6 +52,7 @@
         },
         {
           "text": "走向右边那扇普通的门",
+          "textKey": "scene.intro.choice.right_door",
           "targetScene": "right_door",
           "effects": [
             { "type": "add", "target": "courage", "value": -5 }
@@ -54,10 +60,12 @@
         },
         {
           "text": "仔细搜索房间",
+          "textKey": "scene.intro.choice.search",
           "targetScene": "investigation_site"
         },
         {
           "text": "留在原地，什么也不做",
+          "textKey": "scene.intro.choice.stay",
           "targetScene": "stay"
         }
       ]
diff --git a/public/subtitles/intro_en.vtt b/public/subtitles/intro_en.vtt
new file mode 100644
index 0000000..fceb329
--- /dev/null
+++ b/public/subtitles/intro_en.vtt
@@ -0,0 +1,7 @@
+WEBVTT
+
+00:00.000 --> 00:02.000
+You wake up in a strange room
+
+00:02.500 --> 00:03.000
+Two doors stand before you. You must choose.
diff --git a/public/subtitles/left_door_en.vtt b/public/subtitles/left_door_en.vtt
new file mode 100644
index 0000000..01513d7
--- /dev/null
+++ b/public/subtitles/left_door_en.vtt
@@ -0,0 +1,7 @@
+WEBVTT
+
+00:00.000 --> 00:02.500
+You walk through the glowing door into a bright hall
+
+00:02.500 --> 00:03.000
+A stranger extends their hand toward you
diff --git a/public/subtitles/stay_en.vtt b/public/subtitles/stay_en.vtt
new file mode 100644
index 0000000..c44fb77
--- /dev/null
+++ b/public/subtitles/stay_en.vtt
@@ -0,0 +1,4 @@
+WEBVTT
+
+00:00.000 --> 00:03.000
+You choose to stay where you are. Time passes slowly...
diff --git a/src/components/ChapterSelect.vue b/src/components/ChapterSelect.vue
index 7541d91..5156af4 100644
--- a/src/components/ChapterSelect.vue
+++ b/src/components/ChapterSelect.vue
@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import { ref, watch, nextTick } from 'vue'
 import type { ChapterInfo } from '@engine/types'
+import { useI18n } from '@/composables/useI18n'
 
 const props = defineProps<{
   chapters: ChapterInfo[]
@@ -12,6 +13,7 @@ const emit = defineEmits<{
   back: []
 }>()
 
+const { t } = useI18n()
 const focusIdx = ref(0)
 const cardRefs = ref<(HTMLDivElement | null)[]>([])
 
@@ -60,7 +62,7 @@ function onKeydown(e: KeyboardEvent, index: number) {
 <template>
   <div class="chapter-overlay" @keydown="(e: KeyboardEvent) => { if (e.key === 'Escape' || e.key === 'Backspace') { e.preventDefault(); emit('back'); } }">
     <div class="chapter-panel">
-      <h2 class="chapter-title">章节选择</h2>
+      <h2 class="chapter-title">{{ t('ui.chapters') }}</h2>
 
       <div class="chapter-grid">
         <div
@@ -82,7 +84,7 @@ function onKeydown(e: KeyboardEvent, index: number) {
         </div>
       </div>
 
-      <button class="back-btn" @click="emit('back')">返回 (Esc)</button>
+      <button class="back-btn" @click="emit('back')">{{ t('ui.back') }} (Esc)</button>
     </div>
   </div>
 </template>
diff --git a/src/components/ChoicePanel.vue b/src/components/ChoicePanel.vue
index 2c6bda3..57ab0e8 100644
--- a/src/components/ChoicePanel.vue
+++ b/src/components/ChoicePanel.vue
@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import { ref, watch, nextTick, computed } from 'vue'
 import type { Choice } from '@engine/types'
+import { useI18n } from '@/composables/useI18n'
 
 const props = defineProps<{
   choices: Choice[]
@@ -12,6 +13,7 @@ const emit = defineEmits<{
   choose: [index: number]
 }>()
 
+const { t } = useI18n()
 const focusIndex = ref(0)
 const btnRefs = ref<(HTMLButtonElement | null)[]>([])
 
@@ -62,7 +64,7 @@ function onKeydown(e: KeyboardEvent, index: number) {
       ></div>
       <span class="timer-text">{{ timerRemaining.toFixed(1) }}s</span>
     </div>
-    <div class="choice-prompt">做出你的选择</div>
+    <div class="choice-prompt">{{ t('ui.choose') }}</div>
     <div class="choice-list">
       <button
         v-for="(choice, index) in choices"
diff --git a/src/components/LangSwitch.vue b/src/components/LangSwitch.vue
new file mode 100644
index 0000000..cd9e903
--- /dev/null
+++ b/src/components/LangSwitch.vue
@@ -0,0 +1,41 @@
+<script setup lang="ts">
+import { useI18n } from '@/composables/useI18n'
+
+const { currentLang, setLang, t } = useI18n()
+</script>
+
+<template>
+  <div class="lang-switch">
+    <button
+      :class="['lang-btn', { active: currentLang === 'zh' }]"
+      @click="setLang('zh')"
+    >中文</button>
+    <button
+      :class="['lang-btn', { active: currentLang === 'en' }]"
+      @click="setLang('en')"
+    >English</button>
+  </div>
+</template>
+
+<style scoped>
+.lang-switch {
+  display: flex;
+  gap: 2px;
+}
+
+.lang-btn {
+  padding: 4px 10px;
+  font-size: 12px;
+  color: #888;
+  background: rgba(255, 255, 255, 0.05);
+  border: 1px solid rgba(255, 255, 255, 0.1);
+  cursor: pointer;
+  transition: all 0.15s;
+}
+
+.lang-btn:first-child { border-radius: 3px 0 0 3px; }
+.lang-btn:last-child { border-radius: 0 3px 3px 0; }
+
+.lang-btn:hover { color: #ccc; background: rgba(255, 255, 255, 0.1); }
+.lang-btn.active { color: #fff; background: rgba(255, 255, 255, 0.15); border-color: rgba(255, 255, 255, 0.25); }
+</style>
diff --git a/src/components/PlaybackBar.vue b/src/components/PlaybackBar.vue
index 1cd07b0..ff6215c 100644
--- a/src/components/PlaybackBar.vue
+++ b/src/components/PlaybackBar.vue
@@ -1,5 +1,8 @@
 <script setup lang="ts">
 import { ref, watch, onMounted } from 'vue'
+import { useI18n } from '@/composables/useI18n'
+
+const { t } = useI18n()
 
 const props = defineProps<{
   canSkip: boolean
@@ -29,7 +32,7 @@ onMounted(() => updateLabel(props.currentSpeed))
 
 <template>
   <div class="playback-bar">
-    <button v-if="canSkip" class="pb-btn skip-btn" @click="emit('skip')">跳过</button>
+    <button v-if="canSkip" class="pb-btn skip-btn" @click="emit('skip')">{{ t('ui.skip') }}</button>
     <button class="pb-btn speed-btn" @click="toggleSpeed">{{ speedLabel }}</button>
   </div>
 </template>
diff --git a/src/components/SaveLoadMenu.vue b/src/components/SaveLoadMenu.vue
index 34e93da..bd93477 100644
--- a/src/components/SaveLoadMenu.vue
+++ b/src/components/SaveLoadMenu.vue
@@ -1,5 +1,8 @@
 <script setup lang="ts">
 import type { SlotInfo } from '@/stores/gameStore'
+import { useI18n } from '@/composables/useI18n'
+
+const { t } = useI18n()
 
 defineProps<{
   saves: SlotInfo[]
@@ -17,7 +20,7 @@ const maxSlots = 5
 <template>
   <div class="save-overlay" @click.self="emit('close')" @keydown.escape="emit('close')">
     <div class="save-panel">
-      <h2 class="save-title">存档 / 读档</h2>
+      <h2 class="save-title">{{ t('ui.save') }} / {{ t('ui.load') }}</h2>
 
       <div class="slot-list">
         <div class="save-slot auto-save-slot">
@@ -30,11 +33,11 @@ const maxSlots = 5
             <span v-else class="thumb-empty">自动</span>
           </div>
           <div class="slot-meta">
-            <div class="slot-label auto-save-label">自动存档</div>
+            <div class="slot-label auto-save-label">{{ t('ui.autoSave') }}</div>
             <div class="slot-info" v-if="saves.find(s => s.slot === 0)">
               {{ saves.find(s => s.slot === 0)!.sceneLabel }}
             </div>
-            <div class="slot-info empty" v-else>暂无自动存档</div>
+            <div class="slot-info empty" v-else>{{ t('ui.noAutoSave') }}</div>
           </div>
           <div class="slot-actions">
             <button
@@ -42,7 +45,7 @@ const maxSlots = 5
               :disabled="!saves.find(s => s.slot === 0)"
               @click="emit('load', 0)"
             >
-              读取
+              {{ t('ui.load') }}
             </button>
           </div>
         </div>
@@ -58,30 +61,30 @@ const maxSlots = 5
               :src="saves.find(s => s.slot === slot)!.thumbnail"
               class="thumb-img"
             />
-            <span v-else class="thumb-empty">空</span>
+            <span v-else class="thumb-empty">{{ t('ui.empty') }}</span>
           </div>
           <div class="slot-meta">
-            <div class="slot-label">存档 {{ slot }}</div>
+            <div class="slot-label">{{ t('ui.save') }} {{ slot }}</div>
             <div class="slot-info" v-if="saves.find(s => s.slot === slot)">
               {{ saves.find(s => s.slot === slot)!.sceneLabel }}
             </div>
-            <div class="slot-info empty" v-else>空</div>
+            <div class="slot-info empty" v-else>{{ t('ui.empty') }}</div>
           </div>
           <div class="slot-actions">
-            <button class="slot-btn save-btn" @click="emit('save', slot)">保存</button>
+            <button class="slot-btn save-btn" @click="emit('save', slot)">{{ t('ui.save') }}</button>
             <button
               class="slot-btn load-btn"
               :disabled="!saves.find(s => s.slot === slot)"
               @click="emit('load', slot)"
             >
-              读取
+              {{ t('ui.load') }}
             </button>
           </div>
         </div>
       </div>
 
-      <div class="save-hint">游戏会在每次场景切换时自动保存到槽位 0</div>
-      <button class="close-btn" @click="emit('close')">关闭</button>
+      <div class="save-hint">{{ t('ui.autoSaveHint') }}</div>
+      <button class="close-btn" @click="emit('close')">{{ t('ui.close') }}</button>
     </div>
   </div>
 </template>
diff --git a/src/components/Subtitles.vue b/src/components/Subtitles.vue
index 893cd3b..0102df2 100644
--- a/src/components/Subtitles.vue
+++ b/src/components/Subtitles.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { ref, watch } from 'vue'
+import { ref, watch, computed } from 'vue'
 
 interface SubCue {
   start: number
@@ -10,20 +10,25 @@ interface SubCue {
 const props = defineProps<{
   currentTime: number
   subtitleUrl: string | null
+  subtitles?: Record<string, string> | null
+  lang?: string
 }>()
 
 const cues = ref<SubCue[]>([])
 const currentText = ref('')
 const loadedUrl = ref('')
 
-watch(() => props.subtitleUrl, async (url) => {
+const effectiveUrl = computed(() => {
+  if (props.lang && props.subtitles?.[props.lang]) return props.subtitles[props.lang]
+  return props.subtitleUrl
+})
+
+watch(effectiveUrl, async (url) => {
   if (!url) {
     cues.value = []
-    currentText.value = ''
     loadedUrl.value = ''
     return
   }
-  if (url === loadedUrl.value) return
   loadedUrl.value = url
   try {
     const resp = await fetch(url)
diff --git a/src/composables/useGameEngine.ts b/src/composables/useGameEngine.ts
index 2d5a921..aace88c 100644
--- a/src/composables/useGameEngine.ts
+++ b/src/composables/useGameEngine.ts
@@ -3,11 +3,13 @@ import { Engine } from '@engine/core/Engine'
 import { SaveSystem } from '@engine/systems/SaveSystem'
 import type { GameData } from '@engine/types'
 import { useGameStore } from '@/stores/gameStore'
+import { useI18n } from '@/composables/useI18n'
 
 export function useGameEngine(videoEls: () => [HTMLVideoElement | null, HTMLVideoElement | null]) {
   const engine = new Engine()
   const saveSystem = new SaveSystem()
   const store = useGameStore()
+  const { t } = useI18n()
   let lastThumbnail: string | undefined
 
   if (import.meta.env.DEV) {
@@ -34,7 +36,11 @@ export function useGameEngine(videoEls: () => [HTMLVideoElement | null, HTMLVide
   })
 
   engine.on('choiceRequest', (choiceList) => {
-    store.setChoices(choiceList)
+    const translated = choiceList.map((c: any) => ({
+      ...c,
+      text: c.textKey ? t(c.textKey) : c.text,
+    }))
+    store.setChoices(translated)
   })
 
   engine.on('choiceTimer', (timerState) => {
diff --git a/src/composables/useI18n.ts b/src/composables/useI18n.ts
new file mode 100644
index 0000000..2df4b7d
--- /dev/null
+++ b/src/composables/useI18n.ts
@@ -0,0 +1,28 @@
+import { ref } from 'vue'
+import zh from '@/locales/zh.json'
+import en from '@/locales/en.json'
+
+const messages = { zh, en } as const
+type Lang = 'zh' | 'en'
+
+const currentLang = ref<Lang>(
+  (localStorage.getItem('lang') as Lang) || 'zh'
+)
+
+export function useI18n() {
+  function t(key: string): string {
+    const parts = key.split('.')
+    let result: any = messages[currentLang.value]
+    for (const p of parts) {
+      result = result?.[p]
+    }
+    return typeof result === 'string' ? result : key
+  }
+
+  function setLang(lang: Lang) {
+    currentLang.value = lang
+    localStorage.setItem('lang', lang)
+  }
+
+  return { t, currentLang, setLang }
+}
diff --git a/src/locales/en.json b/src/locales/en.json
new file mode 100644
index 0000000..536b695
--- /dev/null
+++ b/src/locales/en.json
@@ -0,0 +1,79 @@
+{
+  "ui": {
+    "start": "New Game",
+    "resume": "Continue",
+    "chapters": "Chapters",
+    "menu": "Menu",
+    "save": "Save",
+    "load": "Load",
+    "close": "Close",
+    "skip": "Skip",
+    "fullscreen": "Fullscreen",
+    "exitFullscreen": "Exit Fullscreen",
+    "gameEnd": "The End",
+    "choose": "Make your choice",
+    "back": "Back",
+    "autoSave": "Auto Save",
+    "empty": "Empty",
+    "loading": "Loading...",
+    "speed": "Speed",
+    "noAutoSave": "No auto save yet",
+    "autoSaveHint": "Game auto-saves to slot 0 at each scene change"
+  },
+  "scene": {
+    "intro": {
+      "choice": {
+        "left_door": "Walk toward the glowing door on the left",
+        "right_door": "Walk toward the ordinary door on the right",
+        "search": "Search the room carefully",
+        "stay": "Stay where you are, do nothing"
+      }
+    },
+    "left_door": {
+      "choice": {
+        "handshake": "Shake hands with the stranger",
+        "reject": "Refuse to shake, stay alert"
+      }
+    },
+    "right_door": {
+      "choice": {
+        "continue": "Keep moving forward",
+        "back": "Turn back"
+      }
+    },
+    "trust_ending": {
+      "choice": {
+        "journey": "Embark on a journey of trust (requires trust >= 80)",
+        "leave": "Leave this place"
+      }
+    },
+    "investigation_site": {
+      "choice": {
+        "leave": "Leave the room"
+      }
+    },
+    "desk_detail": {
+      "choice": {
+        "return": "Return to the crime scene",
+        "leave": "Leave"
+      }
+    },
+    "stay": {
+      "choice": {
+        "stand": "Stand up and leave"
+      }
+    },
+    "qte_success": {
+      "choice": {
+        "continue": "Keep moving forward",
+        "back": "Turn back"
+      }
+    },
+    "qte_fail": {
+      "choice": {
+        "continue": "Keep moving forward",
+        "back": "Turn back"
+      }
+    }
+  }
+}
diff --git a/src/locales/zh.json b/src/locales/zh.json
new file mode 100644
index 0000000..6205b53
--- /dev/null
+++ b/src/locales/zh.json
@@ -0,0 +1,79 @@
+{
+  "ui": {
+    "start": "开始游戏",
+    "resume": "继续上次进度",
+    "chapters": "章节选择",
+    "menu": "菜单",
+    "save": "保存",
+    "load": "读取",
+    "close": "关闭",
+    "skip": "跳过",
+    "fullscreen": "全屏",
+    "exitFullscreen": "退出全屏",
+    "gameEnd": "游戏结束",
+    "choose": "做出你的选择",
+    "back": "返回",
+    "autoSave": "自动存档",
+    "empty": "空",
+    "loading": "加载中...",
+    "speed": "倍速",
+    "noAutoSave": "暂无自动存档",
+    "autoSaveHint": "游戏会在每次场景切换时自动保存到槽位 0"
+  },
+  "scene": {
+    "intro": {
+      "choice": {
+        "left_door": "走向左边那扇发光的门",
+        "right_door": "走向右边那扇普通的门",
+        "search": "仔细搜索房间",
+        "stay": "留在原地，什么也不做"
+      }
+    },
+    "left_door": {
+      "choice": {
+        "handshake": "与陌生人握手",
+        "reject": "拒绝握手，保持警惕"
+      }
+    },
+    "right_door": {
+      "choice": {
+        "continue": "继续前进",
+        "back": "回头"
+      }
+    },
+    "trust_ending": {
+      "choice": {
+        "journey": "开启信任的旅程（需要 trust >= 80）",
+        "leave": "离开这里"
+      }
+    },
+    "investigation_site": {
+      "choice": {
+        "leave": "离开房间"
+      }
+    },
+    "desk_detail": {
+      "choice": {
+        "return": "返回调查现场",
+        "leave": "离开"
+      }
+    },
+    "stay": {
+      "choice": {
+        "stand": "站起来离开"
+      }
+    },
+    "qte_success": {
+      "choice": {
+        "continue": "继续前进",
+        "back": "回头"
+      }
+    },
+    "qte_fail": {
+      "choice": {
+        "continue": "继续前进",
+        "back": "回头"
+      }
+    }
+  }
+}