diff --git a/docs/LOCALIZATION.md b/docs/LOCALIZATION.md
new file mode 100644
index 0000000..9e077bd
--- /dev/null
+++ b/docs/LOCALIZATION.md
@@ -0,0 +1,98 @@
+# Localization Guide
+
+OpenClaw Tray uses WinUI `.resw` resource files for localization. Windows automatically selects the correct language based on the OS locale — no user configuration needed.
+
+## Currently Supported Languages
+
+| Language | Locale | Resource File |
+|----------|--------|---------------|
+| English (US) | `en-us` | `Strings/en-us/Resources.resw` |
+| Chinese (Simplified) | `zh-cn` | `Strings/zh-cn/Resources.resw` |
+
+## Adding a New Language
+
+1. **Copy the English resource file** as your starting point:
+
+   ```
+   src/OpenClaw.Tray.WinUI/Strings/en-us/Resources.resw
+   ```
+
+2. **Create a new folder** for your locale under `Strings/`:
+
+   ```
+   src/OpenClaw.Tray.WinUI/Strings/<locale>/Resources.resw
+   ```
+
+   Use the standard BCP-47 locale tag in lowercase (e.g., `de-de`, `fr-fr`, `ja-jp`, `ko-kr`, `pt-br`, `es-es`).
+
+3. **Translate the `<value>` elements** — do not change the `name` attributes. Each entry looks like:
+
+   ```xml
+   <data name="SettingsSaveButton.Content" xml:space="preserve">
+     <value>Save</value>   <!-- ← translate this -->
+   </data>
+   ```
+
+4. **Keep format placeholders intact.** Some strings use `{0}`, `{1}`, etc. These must remain in the translation:
+
+   ```xml
+   <data name="Menu_SessionsFormat" xml:space="preserve">
+     <value>Sessions ({0})</value>  <!-- {0} = session count -->
+   </data>
+   ```
+
+5. **Do not translate resource key names** (the `name` attribute). Only translate `<value>` content.
+
+6. **Submit a pull request** with just your new `Resources.resw` file. No code changes are needed — the build system automatically discovers new locale folders.
+
+## How It Works
+
+### XAML strings (automatic)
+Elements with `x:Uid` attributes are automatically matched to resource keys:
+```xml
+<Button x:Uid="SettingsSaveButton" Content="Save" />
+```
+Maps to resource key `SettingsSaveButton.Content`.
+
+### C# runtime strings (via LocalizationHelper)
+Code uses `LocalizationHelper.GetString("key")` to load strings at runtime:
+```csharp
+Title = LocalizationHelper.GetString("WindowTitle_Settings");
+```
+
+### Language selection
+Windows picks the language automatically based on the user's OS display language. No in-app language picker is needed.
+
+## Testing a Language Locally
+
+To test a specific locale without changing your Windows language:
+
+1. Open `src/OpenClaw.Tray.WinUI/App.xaml.cs`
+2. Add this line at the top of the `App()` constructor, **before** `InitializeComponent()`:
+   ```csharp
+   LocalizationHelper.SetLanguageOverride("zh-CN");
+   ```
+3. Build and run (`dotnet build src/OpenClaw.Tray.WinUI -r win-x64`). Remove the line when done testing.
+
+> **Note:** This overrides `LocalizationHelper.GetString()` calls (menus, toasts, dialogs, window titles). XAML `x:Uid` bindings follow the OS display language. For full XAML localization testing, change your Windows display language in Settings → Time & Language.
+
+## Resource Key Naming Conventions
+
+| Pattern | Used For | Example |
+|---------|----------|---------|
+| `ComponentName.Property` | XAML `x:Uid` bindings | `SettingsSaveButton.Content` |
+| `WindowTitle_Name` | Window title bars | `WindowTitle_Settings` |
+| `Toast_Name` | Toast notification text | `Toast_NodePaired` |
+| `Menu_Name` | Tray menu items | `Menu_Settings` |
+| `Status_Name` | Status display text | `Status_Connected` |
+| `TimeAgo_Format` | Relative time strings | `TimeAgo_MinutesFormat` |
+
+## Validation
+
+Both resource files must have the **same set of keys**. You can verify with:
+
+```powershell
+$en = (Select-String -Path "src\OpenClaw.Tray.WinUI\Strings\en-us\Resources.resw" -Pattern '<data name="' | Measure-Object).Count
+$new = (Select-String -Path "src\OpenClaw.Tray.WinUI\Strings\<locale>\Resources.resw" -Pattern '<data name="' | Measure-Object).Count
+Write-Host "en-us: $en keys | <locale>: $new keys | Match: $($en -eq $new)"
+```
diff --git a/src/OpenClaw.Tray.WinUI/App.xaml.cs b/src/OpenClaw.Tray.WinUI/App.xaml.cs
index 4bd6aa8..df4f768 100644
--- a/src/OpenClaw.Tray.WinUI/App.xaml.cs
+++ b/src/OpenClaw.Tray.WinUI/App.xaml.cs
@@ -569,8 +569,8 @@ private void CopyDeviceIdToClipboard()
             
             // Show toast confirming copy
             new ToastContentBuilder()
-                .AddText("📋 Device ID Copied")
-                .AddText($"Run: openclaw devices approve {_nodeService.ShortDeviceId}...")
+                .AddText(LocalizationHelper.GetString("Toast_DeviceIdCopied"))
+                .AddText(string.Format(LocalizationHelper.GetString("Toast_DeviceIdCopiedDetail"), _nodeService.ShortDeviceId))
                 .Show();
         }
         catch (Exception ex)
@@ -598,8 +598,8 @@ private void CopyNodeSummaryToClipboard()
             global::Windows.ApplicationModel.DataTransfer.Clipboard.SetContent(dataPackage);
 
             new ToastContentBuilder()
-                .AddText("📋 Node summary copied")
-                .AddText($"{_lastNodes.Length} node(s) copied to clipboard")
+                .AddText(LocalizationHelper.GetString("Toast_NodeSummaryCopied"))
+                .AddText(string.Format(LocalizationHelper.GetString("Toast_NodeSummaryCopiedDetail"), _lastNodes.Length))
                 .Show();
         }
         catch (Exception ex)
@@ -655,8 +655,8 @@ private async Task ExecuteSessionActionAsync(string action, string sessionKey, s
             if (!sent)
             {
                 new ToastContentBuilder()
-                    .AddText("❌ Session action failed")
-                    .AddText("Could not send request to gateway.")
+                    .AddText(LocalizationHelper.GetString("Toast_SessionActionFailed"))
+                    .AddText(LocalizationHelper.GetString("Toast_SessionActionFailedDetail"))
                     .Show();
                 return;
             }
@@ -672,7 +672,7 @@ private async Task ExecuteSessionActionAsync(string action, string sessionKey, s
             try
             {
                 new ToastContentBuilder()
-                    .AddText("❌ Session action failed")
+                    .AddText(LocalizationHelper.GetString("Toast_SessionActionFailed"))
                     .AddText(ex.Message)
                     .Show();
             }
@@ -1158,8 +1158,8 @@ private void OnNodeStatusChanged(object? sender, ConnectionStatus status)
             try
             {
                 new ToastContentBuilder()
-                    .AddText("🔌 Node Mode Active")
-                    .AddText("This PC can now receive commands from the agent (canvas, screenshots)")
+                    .AddText(LocalizationHelper.GetString("Toast_NodeModeActive"))
+                    .AddText(LocalizationHelper.GetString("Toast_NodeModeActiveDetail"))
                     .Show();
             }
             catch { /* ignore */ }
@@ -1177,16 +1177,16 @@ private void OnPairingStatusChanged(object? sender, OpenClaw.Shared.PairingStatu
                 AddRecentActivity("Node pairing pending", category: "node", dashboardPath: "nodes", nodeId: args.DeviceId);
                 // Show toast with approval instructions
                 new ToastContentBuilder()
-                    .AddText("⏳ Awaiting Pairing Approval")
-                    .AddText($"Run on gateway: openclaw devices approve {args.DeviceId.Substring(0, 16)}...")
+                    .AddText(LocalizationHelper.GetString("Toast_PairingPending"))
+                    .AddText(string.Format(LocalizationHelper.GetString("Toast_PairingPendingDetail"), args.DeviceId.Substring(0, 16)))
                     .Show();
             }
             else if (args.Status == OpenClaw.Shared.PairingStatus.Paired)
             {
                 AddRecentActivity("Node paired", category: "node", dashboardPath: "nodes", nodeId: args.DeviceId);
                 new ToastContentBuilder()
-                    .AddText("✅ Node Paired!")
-                    .AddText("This PC can now receive commands from the agent")
+                    .AddText(LocalizationHelper.GetString("Toast_NodePaired"))
+                    .AddText(LocalizationHelper.GetString("Toast_NodePairedDetail"))
                     .Show();
             }
         }
@@ -1499,8 +1499,8 @@ private async Task RunHealthCheckAsync(bool userInitiated = false)
             if (userInitiated)
             {
                 new ToastContentBuilder()
-                    .AddText("Health Check")
-                    .AddText("Gateway is not connected yet.")
+                    .AddText(LocalizationHelper.GetString("Toast_HealthCheck"))
+                    .AddText(LocalizationHelper.GetString("Toast_HealthCheckNotConnected"))
                     .Show();
             }
             return;
@@ -1513,8 +1513,8 @@ private async Task RunHealthCheckAsync(bool userInitiated = false)
             if (userInitiated)
             {
                 new ToastContentBuilder()
-                    .AddText("Health Check")
-                    .AddText("Health check request sent.")
+                    .AddText(LocalizationHelper.GetString("Toast_HealthCheck"))
+                    .AddText(LocalizationHelper.GetString("Toast_HealthCheckSent"))
                     .Show();
             }
         }
@@ -1524,7 +1524,7 @@ private async Task RunHealthCheckAsync(bool userInitiated = false)
             if (userInitiated)
             {
                 new ToastContentBuilder()
-                    .AddText("Health Check Failed")
+                    .AddText(LocalizationHelper.GetString("Toast_HealthCheckFailed"))
                     .AddText(ex.Message)
                     .Show();
             }
@@ -1744,10 +1744,10 @@ private void ShowSurfaceImprovementsTipIfNeeded()
         try
         {
             new ToastContentBuilder()
-                .AddText("⚡ New: Activity Stream")
-                .AddText("Open the tray menu to view live sessions, usage, and node activity in one flyout.")
+                .AddText(LocalizationHelper.GetString("Toast_ActivityStreamTip"))
+                .AddText(LocalizationHelper.GetString("Toast_ActivityStreamTipDetail"))
                 .AddButton(new ToastButton()
-                    .SetContent("Open Activity Stream")
+                    .SetContent(LocalizationHelper.GetString("Toast_ActivityStreamTipButton"))
                     .AddArgument("action", "open_activity"))
                 .Show();
         }
diff --git a/src/OpenClaw.Tray.WinUI/Dialogs/DownloadProgressDialog.cs b/src/OpenClaw.Tray.WinUI/Dialogs/DownloadProgressDialog.cs
index 501d5a3..c66b2e4 100644
--- a/src/OpenClaw.Tray.WinUI/Dialogs/DownloadProgressDialog.cs
+++ b/src/OpenClaw.Tray.WinUI/Dialogs/DownloadProgressDialog.cs
@@ -1,6 +1,7 @@
 using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
 using Microsoft.UI.Xaml.Media;
+using OpenClawTray.Helpers;
 using Updatum;
 
 namespace OpenClawTray.Dialogs;
@@ -17,11 +18,11 @@ public DownloadProgressDialog(UpdatumManager updater)
 
     public void ShowAsync()
     {
-        _window = new Window { Title = "Downloading Update..." };
+        _window = new Window { Title = LocalizationHelper.GetString("WindowTitle_Downloading") };
         _window.SystemBackdrop = new MicaBackdrop();
         
         var panel = new StackPanel { Padding = new Thickness(20) };
-        var progressText = new TextBlock { Text = "Downloading update...", Margin = new Thickness(0, 0, 0, 10) };
+        var progressText = new TextBlock { Text = LocalizationHelper.GetString("Download_ProgressText"), Margin = new Thickness(0, 0, 0, 10) };
         var progressBar = new ProgressBar { IsIndeterminate = true };
         
         panel.Children.Add(progressText);
diff --git a/src/OpenClaw.Tray.WinUI/Helpers/LocalizationHelper.cs b/src/OpenClaw.Tray.WinUI/Helpers/LocalizationHelper.cs
index df9e91d..abc27d6 100644
--- a/src/OpenClaw.Tray.WinUI/Helpers/LocalizationHelper.cs
+++ b/src/OpenClaw.Tray.WinUI/Helpers/LocalizationHelper.cs
@@ -5,15 +5,41 @@ namespace OpenClawTray.Helpers;
 
 public static class LocalizationHelper
 {
-    private static ResourceLoader? _loader;
+    private static ResourceManager? _resourceManager;
+    private static ResourceContext? _overrideContext;
+    private static string? _languageOverride;
 
-    private static ResourceLoader Loader => _loader ??= new ResourceLoader();
+    /// <summary>
+    /// Force a specific language for testing (e.g. "zh-CN").
+    /// Must be called before any GetString calls.
+    /// </summary>
+    public static void SetLanguageOverride(string language)
+    {
+        _languageOverride = language;
+        _resourceManager = null;
+        _overrideContext = null;
+    }
+
+    private static ResourceManager Manager => _resourceManager ??= new ResourceManager();
+
+    private static ResourceContext GetContext()
+    {
+        if (_overrideContext != null) return _overrideContext;
+        if (_languageOverride != null)
+        {
+            _overrideContext = Manager.CreateResourceContext();
+            _overrideContext.QualifierValues["Language"] = _languageOverride;
+            return _overrideContext;
+        }
+        return Manager.CreateResourceContext();
+    }
 
     public static string GetString(string resourceKey)
     {
         try
         {
-            var value = Loader.GetString(resourceKey);
+            var candidate = Manager.MainResourceMap.GetValue($"Resources/{resourceKey}", GetContext());
+            var value = candidate?.ValueAsString;
             return string.IsNullOrEmpty(value) ? resourceKey : value;
         }
         catch
diff --git a/src/OpenClaw.Tray.WinUI/Services/NodeService.cs b/src/OpenClaw.Tray.WinUI/Services/NodeService.cs
index 851fe42..b7b5408 100644
--- a/src/OpenClaw.Tray.WinUI/Services/NodeService.cs
+++ b/src/OpenClaw.Tray.WinUI/Services/NodeService.cs
@@ -4,6 +4,7 @@
 using Microsoft.UI.Dispatching;
 using OpenClaw.Shared;
 using OpenClaw.Shared.Capabilities;
+using OpenClawTray.Helpers;
 using OpenClawTray.Windows;
 using Microsoft.UI.Xaml;
 
@@ -417,8 +418,8 @@ private async Task<ScreenCaptureResult> OnScreenCapture(ScreenCaptureArgs args)
             try
             {
                 new ToastContentBuilder()
-                    .AddText("📸 Screen Captured")
-                    .AddText("OpenClaw agent captured your screen")
+                    .AddText(LocalizationHelper.GetString("Toast_ScreenCaptured"))
+                    .AddText(LocalizationHelper.GetString("Toast_ScreenCapturedDetail"))
                     .Show();
             }
             catch { /* ignore notification errors */ }
@@ -457,8 +458,8 @@ private async Task<CameraSnapResult> OnCameraSnap(CameraSnapArgs args)
             try
             {
                 new ToastContentBuilder()
-                    .AddText("📷 Camera access blocked")
-                    .AddText("Enable camera access in Windows Privacy settings for OpenClaw Tray")
+                    .AddText(LocalizationHelper.GetString("Toast_CameraBlocked"))
+                    .AddText(LocalizationHelper.GetString("Toast_CameraBlockedDetail"))
                     .Show();
             }
             catch { }
diff --git a/src/OpenClaw.Tray.WinUI/Strings/en-us/Resources.resw b/src/OpenClaw.Tray.WinUI/Strings/en-us/Resources.resw
index a219e8b..881da12 100644
--- a/src/OpenClaw.Tray.WinUI/Strings/en-us/Resources.resw
+++ b/src/OpenClaw.Tray.WinUI/Strings/en-us/Resources.resw
@@ -466,4 +466,165 @@
     <value>n/a</value>
   </data>
 
+  <!-- ==================== CanvasWindow.xaml ==================== -->
+
+  <data name="WindowTitle_Canvas" xml:space="preserve">
+    <value>Canvas</value>
+  </data>
+  <data name="CanvasErrorTitle.Text" xml:space="preserve">
+    <value>❌ Canvas Error</value>
+  </data>
+  <data name="CanvasRetryButton.Content" xml:space="preserve">
+    <value>Retry</value>
+  </data>
+  <data name="Canvas_ReadyTitle" xml:space="preserve">
+    <value>🎨 Canvas Ready</value>
+  </data>
+  <data name="Canvas_WaitingForContent" xml:space="preserve">
+    <value>Waiting for content...</value>
+  </data>
+
+  <!-- ==================== WebChatWindow.xaml ==================== -->
+
+  <data name="WebChatErrorTitle.Text" xml:space="preserve">
+    <value>Web Chat Unavailable</value>
+  </data>
+  <data name="WebChatOpenBrowserButton.Content" xml:space="preserve">
+    <value>Open in Browser Instead</value>
+  </data>
+  <data name="WebChat_ConnectionError" xml:space="preserve">
+    <value>Can't reach OpenClaw Gateway</value>
+  </data>
+  <data name="WebChat_ConnectionErrorDetail" xml:space="preserve">
+    <value>The gateway at {0} is not responding.
+
+To connect:
+• Make sure your OpenClaw gateway is running
+• If remote, connect via VPN to your home network
+• Or use SSH tunnel: ssh -N -L 18789:localhost:18789 your-server</value>
+  </data>
+  <data name="WebChat_CertError" xml:space="preserve">
+    <value>The gateway HTTPS certificate is not trusted.
+
+To connect securely:
+• Use an HTTPS gateway URL (for example: https://host.tailnet.ts.net)
+• If self-signed, import the cert into Windows Trusted Root Certification Authorities
+• Or use SSH tunnel to localhost and keep using localhost URLs</value>
+  </data>
+  <data name="WebChat_InvalidUrl" xml:space="preserve">
+    <value>Invalid gateway URL: {0}</value>
+  </data>
+  <data name="WebChat_SecureContextRequired" xml:space="preserve">
+    <value>Web chat requires a secure context.
+
+There is no safe bypass for remote plain HTTP: browsers and WebView enforce this.
+
+Use one of these options:
+• Use a trusted HTTPS/WSS endpoint (Let's Encrypt, Tailscale Serve, Caddy)
+• If self-signed, import your gateway CA/cert into Windows Trusted Root (certmgr.msc)
+• Or tunnel to localhost: ssh -N -L 18789:localhost:18789 &lt;server&gt;</value>
+  </data>
+
+  <!-- ==================== TrayMenuWindow.xaml ==================== -->
+
+  <data name="WindowTitle_TrayMenu" xml:space="preserve">
+    <value>OpenClaw Menu</value>
+  </data>
+
+  <!-- ==================== Toast: Device / Node ==================== -->
+
+  <data name="Toast_DeviceIdCopied" xml:space="preserve">
+    <value>📋 Device ID Copied</value>
+  </data>
+  <data name="Toast_DeviceIdCopiedDetail" xml:space="preserve">
+    <value>Run: openclaw devices approve {0}...</value>
+  </data>
+  <data name="Toast_NodeSummaryCopied" xml:space="preserve">
+    <value>📋 Node summary copied</value>
+  </data>
+  <data name="Toast_NodeSummaryCopiedDetail" xml:space="preserve">
+    <value>{0} node(s) copied to clipboard</value>
+  </data>
+
+  <!-- ==================== Toast: Session ==================== -->
+
+  <data name="Toast_SessionActionFailed" xml:space="preserve">
+    <value>❌ Session action failed</value>
+  </data>
+  <data name="Toast_SessionActionFailedDetail" xml:space="preserve">
+    <value>Could not send request to gateway.</value>
+  </data>
+
+  <!-- ==================== Toast: Node Mode ==================== -->
+
+  <data name="Toast_NodeModeActive" xml:space="preserve">
+    <value>🔌 Node Mode Active</value>
+  </data>
+  <data name="Toast_NodeModeActiveDetail" xml:space="preserve">
+    <value>This PC can now receive commands from the agent (canvas, screenshots)</value>
+  </data>
+  <data name="Toast_PairingPending" xml:space="preserve">
+    <value>⏳ Awaiting Pairing Approval</value>
+  </data>
+  <data name="Toast_PairingPendingDetail" xml:space="preserve">
+    <value>Run on gateway: openclaw devices approve {0}...</value>
+  </data>
+  <data name="Toast_NodePaired" xml:space="preserve">
+    <value>✅ Node Paired!</value>
+  </data>
+  <data name="Toast_NodePairedDetail" xml:space="preserve">
+    <value>This PC can now receive commands from the agent</value>
+  </data>
+
+  <!-- ==================== Toast: Health Check ==================== -->
+
+  <data name="Toast_HealthCheck" xml:space="preserve">
+    <value>Health Check</value>
+  </data>
+  <data name="Toast_HealthCheckNotConnected" xml:space="preserve">
+    <value>Gateway is not connected yet.</value>
+  </data>
+  <data name="Toast_HealthCheckSent" xml:space="preserve">
+    <value>Health check request sent.</value>
+  </data>
+  <data name="Toast_HealthCheckFailed" xml:space="preserve">
+    <value>Health Check Failed</value>
+  </data>
+
+  <!-- ==================== Toast: Screen / Camera ==================== -->
+
+  <data name="Toast_ScreenCaptured" xml:space="preserve">
+    <value>📸 Screen Captured</value>
+  </data>
+  <data name="Toast_ScreenCapturedDetail" xml:space="preserve">
+    <value>OpenClaw agent captured your screen</value>
+  </data>
+  <data name="Toast_CameraBlocked" xml:space="preserve">
+    <value>📷 Camera access blocked</value>
+  </data>
+  <data name="Toast_CameraBlockedDetail" xml:space="preserve">
+    <value>Enable camera access in Windows Privacy settings for OpenClaw Tray</value>
+  </data>
+
+  <!-- ==================== Toast: Activity Stream Tip ==================== -->
+
+  <data name="Toast_ActivityStreamTip" xml:space="preserve">
+    <value>⚡ New: Activity Stream</value>
+  </data>
+  <data name="Toast_ActivityStreamTipDetail" xml:space="preserve">
+    <value>Open the tray menu to view live sessions, usage, and node activity in one flyout.</value>
+  </data>
+  <data name="Toast_ActivityStreamTipButton" xml:space="preserve">
+    <value>Open Activity Stream</value>
+  </data>
+
+  <!-- ==================== DownloadProgressDialog ==================== -->
+
+  <data name="WindowTitle_Downloading" xml:space="preserve">
+    <value>Downloading Update...</value>
+  </data>
+  <data name="Download_ProgressText" xml:space="preserve">
+    <value>Downloading update...</value>
+  </data>
+
 </root>
diff --git a/src/OpenClaw.Tray.WinUI/Strings/zh-cn/Resources.resw b/src/OpenClaw.Tray.WinUI/Strings/zh-cn/Resources.resw
index 4053744..5da2f3f 100644
--- a/src/OpenClaw.Tray.WinUI/Strings/zh-cn/Resources.resw
+++ b/src/OpenClaw.Tray.WinUI/Strings/zh-cn/Resources.resw
@@ -466,4 +466,165 @@
     <value>无</value>
   </data>
 
+  <!-- ==================== CanvasWindow.xaml ==================== -->
+
+  <data name="WindowTitle_Canvas" xml:space="preserve">
+    <value>画布</value>
+  </data>
+  <data name="CanvasErrorTitle.Text" xml:space="preserve">
+    <value>❌ 画布错误</value>
+  </data>
+  <data name="CanvasRetryButton.Content" xml:space="preserve">
+    <value>重试</value>
+  </data>
+  <data name="Canvas_ReadyTitle" xml:space="preserve">
+    <value>🎨 画布就绪</value>
+  </data>
+  <data name="Canvas_WaitingForContent" xml:space="preserve">
+    <value>等待内容...</value>
+  </data>
+
+  <!-- ==================== WebChatWindow.xaml ==================== -->
+
+  <data name="WebChatErrorTitle.Text" xml:space="preserve">
+    <value>网页聊天不可用</value>
+  </data>
+  <data name="WebChatOpenBrowserButton.Content" xml:space="preserve">
+    <value>在浏览器中打开</value>
+  </data>
+  <data name="WebChat_ConnectionError" xml:space="preserve">
+    <value>无法连接到 OpenClaw 网关</value>
+  </data>
+  <data name="WebChat_ConnectionErrorDetail" xml:space="preserve">
+    <value>网关 {0} 没有响应。
+
+连接方法：
+• 确保 OpenClaw 网关正在运行
+• 如果是远程网关，请通过 VPN 连接到您的家庭网络
+• 或使用 SSH 隧道：ssh -N -L 18789:localhost:18789 your-server</value>
+  </data>
+  <data name="WebChat_CertError" xml:space="preserve">
+    <value>网关 HTTPS 证书不受信任。
+
+安全连接方法：
+• 使用 HTTPS 网关地址（例如：https://host.tailnet.ts.net）
+• 如果是自签名证书，请将其导入 Windows 受信任的根证书颁发机构
+• 或使用 SSH 隧道连接到 localhost 并继续使用 localhost 地址</value>
+  </data>
+  <data name="WebChat_InvalidUrl" xml:space="preserve">
+    <value>无效的网关地址: {0}</value>
+  </data>
+  <data name="WebChat_SecureContextRequired" xml:space="preserve">
+    <value>网页聊天需要安全上下文。
+
+远程纯 HTTP 没有安全的绕过方法：浏览器和 WebView 强制执行此限制。
+
+请使用以下选项之一：
+• 使用受信任的 HTTPS/WSS 端点（Let's Encrypt、Tailscale Serve、Caddy）
+• 如果是自签名证书，请将网关 CA/证书导入 Windows 受信任的根证书（certmgr.msc）
+• 或通过隧道连接到 localhost：ssh -N -L 18789:localhost:18789 &lt;服务器&gt;</value>
+  </data>
+
+  <!-- ==================== TrayMenuWindow.xaml ==================== -->
+
+  <data name="WindowTitle_TrayMenu" xml:space="preserve">
+    <value>OpenClaw 菜单</value>
+  </data>
+
+  <!-- ==================== Toast: Device / Node ==================== -->
+
+  <data name="Toast_DeviceIdCopied" xml:space="preserve">
+    <value>📋 设备 ID 已复制</value>
+  </data>
+  <data name="Toast_DeviceIdCopiedDetail" xml:space="preserve">
+    <value>运行: openclaw devices approve {0}...</value>
+  </data>
+  <data name="Toast_NodeSummaryCopied" xml:space="preserve">
+    <value>📋 节点摘要已复制</value>
+  </data>
+  <data name="Toast_NodeSummaryCopiedDetail" xml:space="preserve">
+    <value>已复制 {0} 个节点到剪贴板</value>
+  </data>
+
+  <!-- ==================== Toast: Session ==================== -->
+
+  <data name="Toast_SessionActionFailed" xml:space="preserve">
+    <value>❌ 会话操作失败</value>
+  </data>
+  <data name="Toast_SessionActionFailedDetail" xml:space="preserve">
+    <value>无法向网关发送请求。</value>
+  </data>
+
+  <!-- ==================== Toast: Node Mode ==================== -->
+
+  <data name="Toast_NodeModeActive" xml:space="preserve">
+    <value>🔌 节点模式已激活</value>
+  </data>
+  <data name="Toast_NodeModeActiveDetail" xml:space="preserve">
+    <value>此电脑现在可以接收来自代理的命令（画布、截图）</value>
+  </data>
+  <data name="Toast_PairingPending" xml:space="preserve">
+    <value>⏳ 等待配对批准</value>
+  </data>
+  <data name="Toast_PairingPendingDetail" xml:space="preserve">
+    <value>在网关上运行: openclaw devices approve {0}...</value>
+  </data>
+  <data name="Toast_NodePaired" xml:space="preserve">
+    <value>✅ 节点已配对！</value>
+  </data>
+  <data name="Toast_NodePairedDetail" xml:space="preserve">
+    <value>此电脑现在可以接收来自代理的命令</value>
+  </data>
+
+  <!-- ==================== Toast: Health Check ==================== -->
+
+  <data name="Toast_HealthCheck" xml:space="preserve">
+    <value>健康检查</value>
+  </data>
+  <data name="Toast_HealthCheckNotConnected" xml:space="preserve">
+    <value>网关尚未连接。</value>
+  </data>
+  <data name="Toast_HealthCheckSent" xml:space="preserve">
+    <value>健康检查请求已发送。</value>
+  </data>
+  <data name="Toast_HealthCheckFailed" xml:space="preserve">
+    <value>健康检查失败</value>
+  </data>
+
+  <!-- ==================== Toast: Screen / Camera ==================== -->
+
+  <data name="Toast_ScreenCaptured" xml:space="preserve">
+    <value>📸 屏幕已捕获</value>
+  </data>
+  <data name="Toast_ScreenCapturedDetail" xml:space="preserve">
+    <value>OpenClaw 代理捕获了您的屏幕</value>
+  </data>
+  <data name="Toast_CameraBlocked" xml:space="preserve">
+    <value>📷 相机访问被阻止</value>
+  </data>
+  <data name="Toast_CameraBlockedDetail" xml:space="preserve">
+    <value>请在 Windows 隐私设置中为 OpenClaw Tray 启用相机访问</value>
+  </data>
+
+  <!-- ==================== Toast: Activity Stream Tip ==================== -->
+
+  <data name="Toast_ActivityStreamTip" xml:space="preserve">
+    <value>⚡ 新功能: 活动流</value>
+  </data>
+  <data name="Toast_ActivityStreamTipDetail" xml:space="preserve">
+    <value>打开托盘菜单即可查看实时会话、用量和节点活动。</value>
+  </data>
+  <data name="Toast_ActivityStreamTipButton" xml:space="preserve">
+    <value>打开活动流</value>
+  </data>
+
+  <!-- ==================== DownloadProgressDialog ==================== -->
+
+  <data name="WindowTitle_Downloading" xml:space="preserve">
+    <value>正在下载更新...</value>
+  </data>
+  <data name="Download_ProgressText" xml:space="preserve">
+    <value>正在下载更新...</value>
+  </data>
+
 </root>
diff --git a/src/OpenClaw.Tray.WinUI/Windows/CanvasWindow.xaml b/src/OpenClaw.Tray.WinUI/Windows/CanvasWindow.xaml
index c27fc25..4daa2d8 100644
--- a/src/OpenClaw.Tray.WinUI/Windows/CanvasWindow.xaml
+++ b/src/OpenClaw.Tray.WinUI/Windows/CanvasWindow.xaml
@@ -31,7 +31,7 @@
                     VerticalAlignment="Center"
                     Spacing="16"
                     Padding="32">
-            <TextBlock Text="❌ Canvas Error" 
+            <TextBlock x:Uid="CanvasErrorTitle" Text="❌ Canvas Error" 
                        FontSize="18" 
                        FontWeight="SemiBold"
                        HorizontalAlignment="Center"/>
@@ -40,7 +40,7 @@
                        MaxWidth="400"
                        HorizontalAlignment="Center"
                        Foreground="{ThemeResource TextFillColorSecondaryBrush}"/>
-            <Button Content="Retry" 
+            <Button x:Uid="CanvasRetryButton" Content="Retry" 
                     HorizontalAlignment="Center"
                     Click="OnRetryClick"/>
         </StackPanel>
diff --git a/src/OpenClaw.Tray.WinUI/Windows/CanvasWindow.xaml.cs b/src/OpenClaw.Tray.WinUI/Windows/CanvasWindow.xaml.cs
index e7b43ca..8ba163d 100644
--- a/src/OpenClaw.Tray.WinUI/Windows/CanvasWindow.xaml.cs
+++ b/src/OpenClaw.Tray.WinUI/Windows/CanvasWindow.xaml.cs
@@ -4,6 +4,7 @@
 using System.Threading.Tasks;
 using Microsoft.UI.Xaml;
 using Microsoft.Web.WebView2.Core;
+using OpenClawTray.Helpers;
 using OpenClawTray.Services;
 using WinUIEx;
 using Windows.Storage.Streams;
@@ -124,26 +125,26 @@ private async void InitializeWebViewAsync()
             else
             {
                 // Default blank page with styling
-                CanvasWebView.CoreWebView2.NavigateToString(@"
+                CanvasWebView.CoreWebView2.NavigateToString($@"
                     <!DOCTYPE html>
                     <html>
                     <head>
                         <style>
-                            body { 
+                            body {{ 
                                 margin: 0; 
                                 padding: 20px;
                                 font-family: 'Segoe UI', sans-serif;
                                 background: transparent;
                                 color: #333;
-                            }
-                            @media (prefers-color-scheme: dark) {
-                                body { color: #eee; }
-                            }
+                            }}
+                            @media (prefers-color-scheme: dark) {{
+                                body {{ color: #eee; }}
+                            }}
                         </style>
                     </head>
                     <body>
-                        <h2>🎨 Canvas Ready</h2>
-                        <p>Waiting for content...</p>
+                        <h2>{LocalizationHelper.GetString("Canvas_ReadyTitle")}</h2>
+                        <p>{LocalizationHelper.GetString("Canvas_WaitingForContent")}</p>
                     </body>
                     </html>
                 ");
diff --git a/src/OpenClaw.Tray.WinUI/Windows/WebChatWindow.xaml b/src/OpenClaw.Tray.WinUI/Windows/WebChatWindow.xaml
index 9e2e5a7..97b2e5e 100644
--- a/src/OpenClaw.Tray.WinUI/Windows/WebChatWindow.xaml
+++ b/src/OpenClaw.Tray.WinUI/Windows/WebChatWindow.xaml
@@ -52,11 +52,11 @@
         <!-- Error display (hidden by default) -->
         <ScrollViewer x:Name="ErrorPanel" Grid.Row="1" Visibility="Collapsed" Padding="20">
             <StackPanel Spacing="12">
-                <TextBlock Text="Web Chat Unavailable" FontSize="18" FontWeight="SemiBold" 
+                <TextBlock x:Uid="WebChatErrorTitle" Text="Web Chat Unavailable" FontSize="18" FontWeight="SemiBold" 
                            Foreground="{ThemeResource SystemFillColorCriticalBrush}"/>
                 <TextBlock x:Name="ErrorText" TextWrapping="Wrap" IsTextSelectionEnabled="True"
                            FontFamily="Consolas" FontSize="12"/>
-                <Button Content="Open in Browser Instead" Click="OnPopout" HorizontalAlignment="Left"/>
+                <Button x:Uid="WebChatOpenBrowserButton" Content="Open in Browser Instead" Click="OnPopout" HorizontalAlignment="Left"/>
             </StackPanel>
         </ScrollViewer>
     </Grid>
diff --git a/src/OpenClaw.Tray.WinUI/Windows/WebChatWindow.xaml.cs b/src/OpenClaw.Tray.WinUI/Windows/WebChatWindow.xaml.cs
index 478023c..8a6bc4b 100644
--- a/src/OpenClaw.Tray.WinUI/Windows/WebChatWindow.xaml.cs
+++ b/src/OpenClaw.Tray.WinUI/Windows/WebChatWindow.xaml.cs
@@ -99,12 +99,8 @@ private async Task InitializeWebViewAsync()
                                       e.WebErrorStatus == CoreWebView2WebErrorStatus.ServerUnreachable))
                 {
                     Logger.Info("WebChatWindow: Gateway unreachable, showing friendly error");
-                    ShowErrorMessage("Can't reach OpenClaw Gateway\n\n" +
-                        $"The gateway at {_gatewayUrl} is not responding.\n\n" +
-                        "To connect:\n" +
-                        "• Make sure your OpenClaw gateway is running\n" +
-                        "• If remote, connect via VPN to your home network\n" +
-                        "• Or use SSH tunnel: ssh -N -L 18789:localhost:18789 your-server");
+                    ShowErrorMessage(LocalizationHelper.GetString("WebChat_ConnectionError") + "\n\n" +
+                        string.Format(LocalizationHelper.GetString("WebChat_ConnectionErrorDetail"), _gatewayUrl));
                     return;
                 }
 
@@ -112,12 +108,7 @@ private async Task InitializeWebViewAsync()
                     e.WebErrorStatus.ToString().Contains("Certificate", StringComparison.OrdinalIgnoreCase))
                 {
                     Logger.Info("WebChatWindow: TLS certificate issue detected");
-                    ShowErrorMessage(
-                        "The gateway HTTPS certificate is not trusted.\n\n" +
-                        "To connect securely:\n" +
-                        "• Use an HTTPS gateway URL (for example: https://host.tailnet.ts.net)\n" +
-                        "• If self-signed, import the cert into Windows Trusted Root Certification Authorities\n" +
-                        "• Or use SSH tunnel to localhost and keep using localhost URLs");
+                    ShowErrorMessage(LocalizationHelper.GetString("WebChat_CertError"));
                 }
             };
             WebView.CoreWebView2.NavigationCompleted += _navigationCompletedHandler;
@@ -184,7 +175,7 @@ private bool TryBuildChatUrl(out string url, out string errorMessage)
         if (!GatewayUrlHelper.TryNormalizeWebSocketUrl(_gatewayUrl, out var normalizedGatewayUrl) ||
             !Uri.TryCreate(normalizedGatewayUrl, UriKind.Absolute, out var gatewayUri))
         {
-            errorMessage = $"Invalid gateway URL: {_gatewayUrl}";
+            errorMessage = string.Format(LocalizationHelper.GetString("WebChat_InvalidUrl"), _gatewayUrl);
             return false;
         }
 
@@ -194,13 +185,7 @@ private bool TryBuildChatUrl(out string url, out string errorMessage)
 
         if (webScheme == "http" && !IsLocalHost(gatewayUri))
         {
-            errorMessage =
-                "Web chat requires a secure context.\n\n" +
-                "There is no safe bypass for remote plain HTTP: browsers and WebView enforce this.\n\n" +
-                "Use one of these options:\n" +
-                "• Use a trusted HTTPS/WSS endpoint (Let's Encrypt, Tailscale Serve, Caddy)\n" +
-                "• If self-signed, import your gateway CA/cert into Windows Trusted Root (certmgr.msc)\n" +
-                "• Or tunnel to localhost: ssh -N -L 18789:localhost:18789 <mac>";
+            errorMessage = LocalizationHelper.GetString("WebChat_SecureContextRequired");
             return false;
         }