diff --git a/CHANGELOG.md b/CHANGELOG.md
index 321add5..ded94f6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # 更新日志
 
+## [3.0.1] - 2026-09-29
+
+### 修复
+
+- 补充简体中文语言声明，使 Edge 商店正确识别扩展语言并提供中文介绍页。
+- 打包流程纳入语言文件，检查缺失的语言消息引用。
+
 ## [3.0.0] - 2026-09-29
 
 ### 新增
@@ -29,3 +36,4 @@
 更早版本尚未整理为独立发行记录，历史改动见 [Git 提交记录](https://github.com/aredddd/GlassNote/commits/main/)。
 
 [3.0.0]: https://github.com/aredddd/GlassNote/releases/tag/v3.0.0
+[3.0.1]: https://github.com/aredddd/GlassNote/releases/tag/v3.0.1
diff --git a/PRIVACY.md b/PRIVACY.md
index e1b17b8..545561a 100644
--- a/PRIVACY.md
+++ b/PRIVACY.md
@@ -1,6 +1,6 @@
 # GlassNote 隐私说明
 
-更新日期：2026 年 9 月 29 日。适用于 GlassNote 3.0.0。
+更新日期：2026 年 9 月 29 日。适用于 GlassNote 3.0.1。
 
 GlassNote 是网页标注与笔记扩展。笔记保存在你使用的浏览器中；扩展没有账号系统、开发者服务器、广告或使用分析服务，不向开发者或第三方上传网页内容和笔记。
 
diff --git a/_locales/zh_CN/messages.json b/_locales/zh_CN/messages.json
new file mode 100644
index 0000000..22557dd
--- /dev/null
+++ b/_locales/zh_CN/messages.json
@@ -0,0 +1,8 @@
+{
+  "extensionName": {
+    "message": "GlassNote"
+  },
+  "extensionDescription": {
+    "message": "轻盈的网页高亮与笔记工具。自动找回原文位置，本地保存，随时整理和导出。"
+  }
+}
diff --git a/docs/EDGE_STORE.md b/docs/EDGE_STORE.md
index acbeede..8c3defa 100644
--- a/docs/EDGE_STORE.md
+++ b/docs/EDGE_STORE.md
@@ -1,6 +1,6 @@
 # Edge 商店发布材料
 
-对应版本：3.0.0。此文件是提交材料，不代表已经提交审核或已经上架。
+对应版本：3.0.1。此文件是提交材料，不代表已经提交审核或已经上架。
 
 ## 商店字段
 
@@ -57,7 +57,7 @@ GlassNote 用于在网页中标注文字、记录笔记，并在以后打开同
 
 ## 资源规格与官方入口
 
-安装包位于 dist/GlassNote-v3.0.0.zip；商店图标可用 assets/icon-128.png。截图使用扩展实际运行界面，尺寸为 1280 × 800，不放入用户的私人笔记或第三方宣传素材。
+安装包位于 dist/GlassNote-v3.0.1.zip；商店图标可用 assets/icon-128.png。截图使用扩展实际运行界面，尺寸为 1280 × 800，不放入用户的私人笔记或第三方宣传素材。
 
 - [Edge 开发者注册](https://learn.microsoft.com/en-us/microsoft-edge/extensions/publish/create-dev-account)
 - [Edge 扩展发布说明](https://learn.microsoft.com/en-us/microsoft-edge/extensions/publish/publish-extension)
diff --git a/manifest.json b/manifest.json
index 07e3b7a..57233fe 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,9 +1,10 @@
 {
   "manifest_version": 3,
-  "name": "GlassNote",
-  "version": "3.0.0",
+  "name": "__MSG_extensionName__",
+  "version": "3.0.1",
+  "default_locale": "zh_CN",
   "minimum_chrome_version": "105",
-  "description": "轻盈的网页高亮与笔记工具。自动找回原文位置，本地保存，随时整理和导出。",
+  "description": "__MSG_extensionDescription__",
   "permissions": ["activeTab", "storage", "scripting"],
   "background": { "service_worker": "src/background/background.js" },
   "options_page": "src/library/library.html",
diff --git a/package-lock.json b/package-lock.json
index a1dc9f6..3f493a3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "glassnote",
-  "version": "3.0.0",
+  "version": "3.0.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "glassnote",
-      "version": "3.0.0",
+      "version": "3.0.1",
       "devDependencies": {
         "playwright": "1.63.0",
         "prettier": "3.9.9"
diff --git a/package.json b/package.json
index 683bd73..dcf10fb 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "glassnote",
-  "version": "3.0.0",
+  "version": "3.0.1",
   "private": true,
   "description": "轻盈、可靠的本地网页笔记工具",
   "scripts": {
@@ -8,8 +8,8 @@
     "test:e2e": "node --test tests/extension.e2e.cjs",
     "test:live": "node tests/live-site.cjs",
     "check": "node scripts/check.cjs",
-    "format": "prettier --write src styles scripts tests .github docs manifest.json package.json package-lock.json \"*.md\"",
-    "format:check": "prettier --check src styles scripts tests .github docs manifest.json package.json package-lock.json \"*.md\"",
+    "format": "prettier --write src styles _locales scripts tests .github docs manifest.json package.json package-lock.json \"*.md\"",
+    "format:check": "prettier --check src styles _locales scripts tests .github docs manifest.json package.json package-lock.json \"*.md\"",
     "package": "node scripts/package.cjs",
     "package:verify": "node scripts/verify-package.cjs"
   },
diff --git a/scripts/check.cjs b/scripts/check.cjs
index 1174739..7cd8ada 100644
--- a/scripts/check.cjs
+++ b/scripts/check.cjs
@@ -12,6 +12,30 @@ function walk(directory) {
 }
 walk(path.join(root, 'src'));
 const manifest = JSON.parse(fs.readFileSync(path.join(root, 'manifest.json'), 'utf8'));
+const localeReferences = [...JSON.stringify(manifest).matchAll(/__MSG_([A-Za-z0-9_]+)__/g)].map(
+  (match) => match[1],
+);
+const localeRoot = path.join(root, '_locales');
+if ((localeReferences.length || fs.existsSync(localeRoot)) && !manifest.default_locale)
+  throw new Error('使用语言包时必须声明 default_locale');
+if (manifest.default_locale) {
+  if (!/^[A-Za-z0-9_]+$/.test(manifest.default_locale))
+    throw new Error('default_locale 必须是合法的语言目录名');
+  const messagesPath = path.join(localeRoot, manifest.default_locale, 'messages.json');
+  if (!fs.existsSync(messagesPath)) throw new Error('缺少默认语言包：' + messagesPath);
+  const messages = JSON.parse(fs.readFileSync(messagesPath, 'utf8'));
+  if (!messages || typeof messages !== 'object' || Array.isArray(messages))
+    throw new Error('语言包必须是消息名称到消息内容的对象');
+  const normalizedMessages = new Map();
+  for (const [key, value] of Object.entries(messages)) {
+    if (!value || typeof value.message !== 'string' || !value.message.trim())
+      throw new Error('语言包消息内容不能为空：' + key);
+    normalizedMessages.set(key.toLowerCase(), value.message);
+  }
+  for (const key of localeReferences)
+    if (!normalizedMessages.has(key.toLowerCase()))
+      throw new Error('默认语言包缺少 manifest 引用的消息：' + key);
+}
 const files = [
   manifest.background.service_worker,
   manifest.action.default_popup,
@@ -31,4 +55,4 @@ for (const [size, file] of Object.entries(manifest.icons)) {
   )
     throw new Error('扩展图标必须是正确尺寸的 PNG：' + file);
 }
-console.log('JavaScript 语法和扩展入口检查通过。');
+console.log('JavaScript 语法、扩展入口和语言包检查通过。');
diff --git a/scripts/package-lib.cjs b/scripts/package-lib.cjs
index 6b9bbf7..dc8958b 100644
--- a/scripts/package-lib.cjs
+++ b/scripts/package-lib.cjs
@@ -13,6 +13,7 @@ const REQUIRED_FILES = [
   'SECURITY.md',
 ];
 const TREES = {
+  _locales: /\.json$/,
   src: /\.(js|html|css)$/,
   styles: /\.css$/,
   assets: /\.(png|svg|ico|webp)$/,
diff --git a/tests/extension.e2e.cjs b/tests/extension.e2e.cjs
index b3d5410..55434c6 100644
--- a/tests/extension.e2e.cjs
+++ b/tests/extension.e2e.cjs
@@ -98,6 +98,20 @@ after(async () => {
   fs.rmSync(profile, { recursive: true, force: true });
 });
 
+test('真实扩展：默认简体中文语言资源可解析', async () => {
+  const localized = await worker.evaluate(() => ({
+    name: chrome.runtime.getManifest().name,
+    description: chrome.runtime.getManifest().description,
+    message: chrome.i18n.getMessage('extensionDescription'),
+  }));
+  assert.equal(localized.name, 'GlassNote');
+  assert.equal(
+    localized.description,
+    '轻盈的网页高亮与笔记工具。自动找回原文位置，本地保存，随时整理和导出。',
+  );
+  assert.equal(localized.message, localized.description);
+});
+
 test('真实扩展：跨节点标注不破坏链接，隐藏保留原文，刷新和关页重开恢复', async () => {
   await openArticle();
   const beforeHTML = await page.locator('#linked').innerHTML();
diff --git a/tests/package.test.cjs b/tests/package.test.cjs
index 921859a..9f3e0e0 100644
--- a/tests/package.test.cjs
+++ b/tests/package.test.cjs
@@ -4,6 +4,7 @@ const fs = require('node:fs');
 const path = require('node:path');
 const os = require('node:os');
 const { createHash } = require('node:crypto');
+const { spawnSync } = require('node:child_process');
 const {
   packageExtension,
   releaseVersion,
@@ -18,7 +19,23 @@ function fixture(t) {
     fs.mkdirSync(path.dirname(path.join(root, name)), { recursive: true });
     fs.writeFileSync(path.join(root, name), value);
   };
-  write('manifest.json', JSON.stringify({ manifest_version: 3, version: '3.2.1' }));
+  write(
+    'manifest.json',
+    JSON.stringify({
+      manifest_version: 3,
+      version: '3.2.1',
+      name: '__MSG_extensionName__',
+      description: '__MSG_extensionDescription__',
+      default_locale: 'zh_CN',
+    }),
+  );
+  write(
+    '_locales/zh_CN/messages.json',
+    JSON.stringify({
+      extensionName: { message: 'GlassNote' },
+      extensionDescription: { message: '轻盈的网页高亮与笔记工具。' },
+    }),
+  );
   write('package.json', JSON.stringify({ version: '3.2.1' }));
   write(
     'package-lock.json',
@@ -56,17 +73,23 @@ test('发布包按版本命名，附许可证和隐私声明，排除依赖、
   assert.equal(path.basename(result.archive), 'GlassNote-v3.2.1.zip');
   const archive = fs.readFileSync(result.archive);
   const entries = readArchive(archive);
-  assert.equal(entries.size, 11);
+  assert.equal(entries.size, 12);
   for (const name of [
     'LICENSE',
     'PRIVACY.md',
     'THIRD_PARTY_NOTICES.md',
     'CONTRIBUTING.md',
     'SECURITY.md',
+    '_locales/zh_CN/messages.json',
     'docs/安装说明.md',
   ])
     assert.ok(entries.has(name), name);
   assert.equal(entries.get('docs/安装说明.md').toString(), '中文文档应当正确保存在 ZIP 中。\n');
+  const manifest = JSON.parse(entries.get('manifest.json').toString());
+  const messages = JSON.parse(entries.get('_locales/zh_CN/messages.json').toString());
+  assert.equal(manifest.default_locale, 'zh_CN');
+  assert.equal(messages.extensionName.message, 'GlassNote');
+  assert.equal(messages.extensionDescription.message, '轻盈的网页高亮与笔记工具。');
   assert.ok(
     [...entries.keys()].every((name) => !/node_modules|work\/|tests\/|\.env|debug/.test(name)),
   );
@@ -125,3 +148,32 @@ test('发布白名单内的符号链接不能将外部文件带入安装包', (t
   fs.symlinkSync(path.join(root, 'LICENSE'), path.join(root, 'src/linked.js'));
   assert.throws(() => packageExtension(root, output), /符号链接/);
 });
+
+test('扩展检查拒绝缺失默认语言声明、语言包或 manifest 引用的消息', (t) => {
+  const { root, write } = fixture(t);
+  write('scripts/check.cjs', fs.readFileSync(path.join(__dirname, '../scripts/check.cjs')));
+  const manifest = JSON.parse(fs.readFileSync(path.join(root, 'manifest.json'), 'utf8'));
+  Object.assign(manifest, {
+    background: { service_worker: 'src/background/background.js' },
+    action: { default_popup: 'src/background/background.js' },
+    options_page: 'src/background/background.js',
+    icons: {},
+    content_scripts: [],
+  });
+  const saveManifest = () => write('manifest.json', JSON.stringify(manifest));
+  const check = () =>
+    spawnSync(process.execPath, [path.join(root, 'scripts/check.cjs')], { encoding: 'utf8' });
+  saveManifest();
+  assert.equal(check().status, 0);
+  delete manifest.default_locale;
+  saveManifest();
+  assert.match(check().stderr, /必须声明 default_locale/);
+  manifest.default_locale = 'zh_CN';
+  manifest.name = '__MSG_missingName__';
+  saveManifest();
+  assert.match(check().stderr, /缺少 manifest 引用的消息：missingName/);
+  write('_locales/zh_CN/messages.json', JSON.stringify({ extensionName: { message: '' } }));
+  assert.match(check().stderr, /消息内容不能为空/);
+  fs.rmSync(path.join(root, '_locales/zh_CN/messages.json'));
+  assert.match(check().stderr, /缺少默认语言包/);
+});