diff --git a/src/PazeE.Installer/PazeE.Installer.Bundle.wixproj b/src/PazeE.Installer/PazeE.Installer.Bundle.wixproj
index e034f91..2bf4a3a 100644
--- a/src/PazeE.Installer/PazeE.Installer.Bundle.wixproj
+++ b/src/PazeE.Installer/PazeE.Installer.Bundle.wixproj
@@ -4,9 +4,11 @@
     <OutputName>PazeE-0.1.0-alpha-win-x64</OutputName>
     <OutputType>Bundle</OutputType>
     <OutputPath>..\..\publish\0.1.0-alpha\installer\</OutputPath>
-    <DefineConstants>PazeEVersion=0.1.0-alpha;MsiVersion=0.1.0;MsiTargetPath=$(MSBuildProjectDirectory)\obj\Release\PazeE-0.1.0-alpha-win-x64.msi</DefineConstants>
-    <!-- 两个项目共享同一目录：排除 Product.wxs，仅编译 Bundle.wxs -->
-    <DefaultItemExcludes>$(DefaultItemExcludes);Product.wxs</DefaultItemExcludes>
+    <DefineConstants>PazeEVersion=0.1.0-alpha;MsiVersion=0.1.0;MsiTargetPath=$(MSBuildProjectDirectory)\obj\Release\zh-cn\PazeE-0.1.0-alpha-win-x64.msi</DefineConstants>
+    <Cultures>zh-cn</Cultures>
+    <DefaultCulture>zh-cn</DefaultCulture>
+    <!-- 两个项目共享同一目录：排除 Product.wxs 和 .wxl 本地化文件（由 MSI 项目处理） -->
+    <DefaultItemExcludes>$(DefaultItemExcludes);Product.wxs;*.wxl</DefaultItemExcludes>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/PazeE.Installer/PazeE.Installer.Msi.wixproj b/src/PazeE.Installer/PazeE.Installer.Msi.wixproj
index c3930af..111dec6 100644
--- a/src/PazeE.Installer/PazeE.Installer.Msi.wixproj
+++ b/src/PazeE.Installer/PazeE.Installer.Msi.wixproj
@@ -16,15 +16,27 @@
     <TreatValidationWarningsAsErrors>false</TreatValidationWarningsAsErrors>
     <!-- 两个项目共享同一目录：排除 Bundle.wxs，SDK 自动包含 Product.wxs + heat 生成文件 -->
     <DefaultItemExcludes>$(DefaultItemExcludes);Bundle.wxs</DefaultItemExcludes>
+    <!-- MSI 输出目录（同时发布 MSI 到 installer 目录，与 .exe 并列） -->
+    <PublishDir>..\..\publish\0.1.0-alpha\installer\</PublishDir>
+    <!-- 多语言构建：简体中文(默认) + English + 繁體中文 -->
+    <Cultures>zh-cn;en-us;zh-tw</Cultures>
+    <DefaultCulture>zh-cn</DefaultCulture>
   </PropertyGroup>
 
   <ItemGroup>
     <!-- heat 任务宿主：提供 HarvestDirectory item 处理 -->
     <PackageReference Include="WixToolset.Heat" Version="6.0.2" />
-    <!-- WixUI 扩展：提供 WixUI_Mondo 等对话框集（许可协议/功能选择/路径浏览） -->
+    <!-- WixUI 扩展：提供 WixUI_InstallDir 对话框集（许可协议/路径选择） -->
     <PackageReference Include="WixToolset.UI.wixext" Version="6.0.2" />
   </ItemGroup>
 
+  <!-- 本地化文件：三种语言的 UI 字符串 -->
+  <ItemGroup>
+    <WixLocalization Include="en-US.wxl" Culture="en-us" />
+    <WixLocalization Include="zh-CN.wxl" Culture="zh-cn" />
+    <WixLocalization Include="zh-TW.wxl" Culture="zh-tw" />
+  </ItemGroup>
+
   <ItemGroup>
     <!-- 自动收割 publish\0.1.0-alpha\bin 下全部文件为 ComponentGroup -->
     <HarvestDirectory Include="$(MSBuildProjectDirectory)\$(PublishBinDir)">
@@ -40,4 +52,15 @@
     </HarvestDirectory>
   </ItemGroup>
 
+  <!-- 构建后复制 MSI 到 publish 目录（与 Bundle .exe 并列） -->
+  <!-- 多语言构建：每个 culture 生成独立 MSI，复制默认语言(zh-cn)到 publish -->
+  <Target Name="PublishMsi" AfterTargets="Build" Condition="'$(PublishDir)' != ''">
+    <ItemGroup>
+      <_MsiFiles Include="$(OutputPath)$(DefaultCulture)\*.msi" />
+    </ItemGroup>
+    <Copy SourceFiles="@(_MsiFiles)"
+          DestinationFolder="$(MSBuildProjectDirectory)\$(PublishDir)"
+          SkipUnchangedFiles="true" />
+  </Target>
+
 </Project>
diff --git a/src/PazeE.Installer/Product.wxs b/src/PazeE.Installer/Product.wxs
index fc5d642..aefbd16 100644
--- a/src/PazeE.Installer/Product.wxs
+++ b/src/PazeE.Installer/Product.wxs
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Wix xmlns="http://wixtoolset.org/schemas/v4/wxs"
      xmlns:ui="http://wixtoolset.org/schemas/v4/wxs/ui">
 
@@ -6,23 +6,23 @@
   <?define UpgradeCode = "8F4E2A91-3B7C-4D9E-8A12-5F6E1C7B2D90" ?>
 
   <Package
-      Name="PazeE Language"
-      Manufacturer="PazeE Project"
+      Name="!(loc.PazeEProductName)"
+      Manufacturer="!(loc.PazeEPublisher)"
       Language="1033"
       Version="$(var.MsiVersion)"
       UpgradeCode="$(var.UpgradeCode)"
       Scope="perMachine">
 
     <!-- 版本升级与降级保护 -->
-    <MajorUpgrade DowngradeErrorMessage="A newer version of PazeE is already installed." />
+    <MajorUpgrade DowngradeErrorMessage="!(loc.DowngradeError)" />
     <Media Id="1" Cabinet="paze.cab" EmbedCab="yes" />
 
     <!-- ARP（添加/删除程序）信息：图标、版权声明、链接 -->
     <Icon Id="PazeEIcon.ico" SourceFile="logo.ico" />
     <Property Id="ARPPRODUCTICON" Value="PazeEIcon.ico" />
     <Property Id="ARPHELPLINK" Value="https://github.com/PazeE/paze" />
-    <Property Id="ARPCOMMENTS" Value="PazeE Language Compiler — Licensed under GPL-3.0" />
-    <Property Id="ARPCONTACT" Value="PazeE Project" />
+    <Property Id="ARPCOMMENTS" Value="!(loc.ARPComments)" />
+    <Property Id="ARPCONTACT" Value="!(loc.ARPContact)" />
     <Property Id="ARPURLINFOABOUT" Value="https://github.com/PazeE/paze" />
     <Property Id="ARPURLUPDATEINFO" Value="https://github.com/PazeE/paze" />
     <Property Id="ARPNOREPAIR" Value="1" />
@@ -30,10 +30,13 @@
     <!-- 许可协议 RTF：LicenseAgreementDlg 显示 GPL3 全文 -->
     <WixVariable Id="WixUILicenseRtf" Value="license.rtf" />
 
-    <!-- 品牌化位图：替换 WixUI 默认蓝色位图，打造大厂级专业外观 -->
+    <!-- 品牌化位图 -->
     <WixVariable Id="WixUIDialogBmp" Value="dialog_bg.png" />
     <WixVariable Id="WixUIBannerBmp" Value="banner.png" />
 
+    <!-- 默认语言：简体中文（如果用户未选择） -->
+    <Property Id="UILanguage" Value="zh-cn" />
+
     <!-- 安装目录：C:\Program Files\PazeE\0.1.0-alpha\ -->
     <StandardDirectory Id="ProgramFiles64Folder">
       <Directory Id="PazeEFolder" Name="PazeE">
@@ -41,17 +44,17 @@
       </Directory>
     </StandardDirectory>
 
-    <!-- 主 Feature：收割的文件 + PATH 组件 -->
-    <Feature Id="Complete" Title="PazeE Language" Level="1"
+    <!-- 主 Feature -->
+    <Feature Id="Complete" Title="!(loc.PazeEProductName)" Level="1"
              ConfigurableDirectory="INSTALLFOLDER"
              Display="expand">
-      <Feature Id="Binaries" Title="Compiler binaries" Level="1">
+      <Feature Id="Binaries" Title="!(loc.BinariesTitle)" Level="1">
         <ComponentGroupRef Id="PazeEBinFiles" />
         <ComponentRef Id="PathEnvironmentComponent" />
       </Feature>
     </Feature>
 
-    <!-- PATH 环境变量组件：把 INSTALLFOLDER 追加到系统 PATH，卸载时自动移除 -->
+    <!-- PATH 环境变量组件 -->
     <Component Id="PathEnvironmentComponent"
                Guid="C1A5F7E2-9B3D-4E8A-9F12-6B7C8D2E1A45"
                Directory="INSTALLFOLDER"
@@ -65,22 +68,20 @@
                    Action="set"
                    System="yes" />
 
-      <!-- 安装信息注册表标记 -->
       <RegistryKey Root="HKLM" Key="SOFTWARE\PazeE\0.1.0-alpha">
         <RegistryValue Type="string" Name="InstallPath" Value="[INSTALLFOLDER]" />
         <RegistryValue Type="string" Name="Version" Value="$(var.PazeEVersion)" />
       </RegistryKey>
     </Component>
 
-    <!-- 安装向导 UI：WixUI_InstallDir 简洁三步流程（类似 Python 安装器）
-         ① 许可协议(GPL3 全文，接受/不接受) → ② 安装路径(浏览选择) → ③ 安装进度 → 完成 -->
+    <!-- 安装向导 UI -->
     <Property Id="WIXUI_INSTALLDIR" Value="INSTALLFOLDER" />
     <ui:WixUI Id="WixUI_InstallDir" />
     <UIRef Id="WixUI_ErrorProgressText" />
 
     <!-- 安装完成提示 -->
     <Property Id="WIXUI_EXITDIALOGOPTIONALTEXT"
-              Value="Thank you for installing PazeE Language. Run 'paze --help' in a terminal to get started." />
+              Value="!(loc.ExitText)" />
 
   </Package>
 
diff --git a/src/PazeE.Installer/dialog_bg.png b/src/PazeE.Installer/dialog_bg.png
index f3dc1f3..4c5812c 100644
Binary files a/src/PazeE.Installer/dialog_bg.png and b/src/PazeE.Installer/dialog_bg.png differ
diff --git a/src/PazeE.Installer/en-US.wxl b/src/PazeE.Installer/en-US.wxl
new file mode 100644
index 0000000..2e6bc44
--- /dev/null
+++ b/src/PazeE.Installer/en-US.wxl
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<WixLocalization xmlns="http://wixtoolset.org/schemas/v4/wxl" Language="en-US" Culture="en-us">
+  <String Id="PazeEProductName" Value="PazeE Language" />
+  <String Id="PazeEPublisher" Value="PazeE Project" />
+  <String Id="WelcomeText1" Value="The Setup Wizard will install PazeE Language on your computer. Click Next to continue or Cancel to exit the Setup Wizard." />
+  <String Id="LicenseText" Value="Please review the license agreement before installing PazeE Language." />
+  <String Id="LicenseAccept" Value="I accept the terms in the License Agreement" />
+  <String Id="LicenseDecline" Value="I do not accept the terms in the License Agreement" />
+  <String Id="InstallText1" Value="Click Install to begin the installation." />
+  <String Id="InstallText2" Value="Setup is ready to install PazeE Language on your computer." />
+  <String Id="ProgressText" Value="Installing PazeE Language, please wait..." />
+  <String Id="ExitText" Value="Thank you for installing PazeE Language. Run 'paze --help' in a terminal to get started." />
+  <String Id="ExitText2" Value="The Setup Wizard has finished installing PazeE Language on your computer." />
+  <String Id="LaunchText" Value="Launch PazeE Language" />
+  <String Id="NextBtn" Value="Next &amp;" />
+  <String Id="BackBtn" Value="&amp;Back" />
+  <String Id="InstallBtn" Value="&amp;Install" />
+  <String Id="FinishBtn" Value="&amp;Finish" />
+  <String Id="CancelBtn" Value="&amp;Cancel" />
+  <String Id="BrowseBtn" Value="&amp;Browse..." />
+  <String Id="InstallDirLabel" Value="Destination Folder" />
+  <String Id="InstallDirText" Value="Setup will install PazeE Language into the following folder. Click Change to install to a different folder." />
+  <String Id="ChangeBtn" Value="Ch&amp;ange" />
+  <String Id="LangSelectText" Value="Please select your preferred language:" />
+  <String Id="LangEnglish" Value="English" />
+  <String Id="LangChineseSimplified" Value="Chinese (Simplified)" />
+  <String Id="LangChineseTraditional" Value="Chinese (Traditional)" />
+  <String Id="ARPComments" Value="PazeE Language Compiler — Licensed under GPL-3.0" />
+  <String Id="ARPContact" Value="PazeE Project" />
+  <String Id="DowngradeError" Value="A newer version of PazeE is already installed." />
+  <String Id="BinariesTitle" Value="Compiler binaries" />
+</WixLocalization>
diff --git a/src/PazeE.Installer/zh-CN.wxl b/src/PazeE.Installer/zh-CN.wxl
new file mode 100644
index 0000000..1693b14
--- /dev/null
+++ b/src/PazeE.Installer/zh-CN.wxl
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<WixLocalization xmlns="http://wixtoolset.org/schemas/v4/wxl" Language="zh-CN" Culture="zh-cn">
+  <String Id="PazeEProductName" Value="PazeE 语言" />
+  <String Id="PazeEPublisher" Value="PazeE 项目" />
+  <String Id="WelcomeText1" Value="安装向导将把 PazeE 语言安装到您的计算机。单击&#x201C;下一步&#x201D;继续，或单击&#x201C;取消&#x201D;退出安装向导。" />
+  <String Id="LicenseText" Value="在安装 PazeE 语言之前，请仔细阅读许可协议。" />
+  <String Id="LicenseAccept" Value="我接受许可协议中的条款" />
+  <String Id="LicenseDecline" Value="我不接受许可协议中的条款" />
+  <String Id="InstallText1" Value="单击&#x201C;安装&#x201D;开始安装。" />
+  <String Id="InstallText2" Value="安装程序已准备好将 PazeE 语言安装到您的计算机。" />
+  <String Id="ProgressText" Value="正在安装 PazeE 语言，请稍候..." />
+  <String Id="ExitText" Value="感谢您安装 PazeE 语言。请在终端中运行 paze --help 以开始使用。" />
+  <String Id="ExitText2" Value="安装向导已完成 PazeE 语言在您计算机上的安装。" />
+  <String Id="LaunchText" Value="启动 PazeE 语言" />
+  <String Id="NextBtn" Value="下一步(&amp;N)" />
+  <String Id="BackBtn" Value="上一步(&amp;B)" />
+  <String Id="InstallBtn" Value="安装(&amp;I)" />
+  <String Id="FinishBtn" Value="完成(&amp;F)" />
+  <String Id="CancelBtn" Value="取消(&amp;C)" />
+  <String Id="BrowseBtn" Value="浏览(&amp;B)..." />
+  <String Id="InstallDirLabel" Value="目标文件夹" />
+  <String Id="InstallDirText" Value="安装程序将把 PazeE 语言安装到以下文件夹。单击&#x201C;更改&#x201D;可安装到其他文件夹。" />
+  <String Id="ChangeBtn" Value="更改(&amp;H)" />
+  <String Id="LangSelectText" Value="请选择您偏好的语言：" />
+  <String Id="LangEnglish" Value="English（英语）" />
+  <String Id="LangChineseSimplified" Value="简体中文" />
+  <String Id="LangChineseTraditional" Value="繁體中文" />
+  <String Id="ARPComments" Value="PazeE 语言编译器 — 基于 GPL-3.0 协议开源" />
+  <String Id="ARPContact" Value="PazeE 项目" />
+  <String Id="DowngradeError" Value="检测到已安装更新版本的 PazeE。" />
+  <String Id="BinariesTitle" Value="编译器核心文件" />
+</WixLocalization>
diff --git a/src/PazeE.Installer/zh-TW.wxl b/src/PazeE.Installer/zh-TW.wxl
new file mode 100644
index 0000000..1ba46bc
--- /dev/null
+++ b/src/PazeE.Installer/zh-TW.wxl
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<WixLocalization xmlns="http://wixtoolset.org/schemas/v4/wxl" Language="zh-TW" Culture="zh-tw">
+  <String Id="PazeEProductName" Value="PazeE 語言" />
+  <String Id="PazeEPublisher" Value="PazeE 專案" />
+  <String Id="WelcomeText1" Value="安裝精靈將把 PazeE 語言安裝到您的電腦。按一下&#x201C;下一步&#x201D;繼續，或按一下&#x201C;取消&#x201D;離開安裝精靈。" />
+  <String Id="LicenseText" Value="在安裝 PazeE 語言之前，請仔細閱讀許可協議。" />
+  <String Id="LicenseAccept" Value="我接受許可協議中的條款" />
+  <String Id="LicenseDecline" Value="我不接受許可協議中的條款" />
+  <String Id="InstallText1" Value="按一下&#x201C;安裝&#x201D;開始安裝。" />
+  <String Id="InstallText2" Value="安裝程式已準備好將 PazeE 語言安裝到您的電腦。" />
+  <String Id="ProgressText" Value="正在安裝 PazeE 語言，請稍候..." />
+  <String Id="ExitText" Value="感謝您安裝 PazeE 語言。請在終端機中執行 paze --help 開始使用。" />
+  <String Id="ExitText2" Value="安裝精靈已完成 PazeE 語言在您電腦上的安裝。" />
+  <String Id="LaunchText" Value="啟動 PazeE 語言" />
+  <String Id="NextBtn" Value="下一步(&amp;N)" />
+  <String Id="BackBtn" Value="上一步(&amp;B)" />
+  <String Id="InstallBtn" Value="安裝(&amp;I)" />
+  <String Id="FinishBtn" Value="完成(&amp;F)" />
+  <String Id="CancelBtn" Value="取消(&amp;C)" />
+  <String Id="BrowseBtn" Value="瀏覽(&amp;B)..." />
+  <String Id="InstallDirLabel" Value="目標資料夾" />
+  <String Id="InstallDirText" Value="安裝程式將把 PazeE 語言安裝到以下資料夾。按一下&#x201C;變更&#x201D;可安裝到其他資料夾。" />
+  <String Id="ChangeBtn" Value="變更(&amp;H)" />
+  <String Id="LangSelectText" Value="請選擇您偏好的語言：" />
+  <String Id="LangEnglish" Value="English（英語）" />
+  <String Id="LangChineseSimplified" Value="簡體中文" />
+  <String Id="LangChineseTraditional" Value="繁體中文" />
+  <String Id="ARPComments" Value="PazeE 語言編譯器 — 基於 GPL-3.0 協議開源" />
+  <String Id="ARPContact" Value="PazeE 專案" />
+  <String Id="DowngradeError" Value="偵測到已安裝更新版本的 PazeE。" />
+  <String Id="BinariesTitle" Value="編譯器核心檔案" />
+</WixLocalization>