diff --git a/demo/Ursa.Demo/App.axaml b/demo/Ursa.Demo/App.axaml
index 8326f56..cb38ace 100644
--- a/demo/Ursa.Demo/App.axaml
+++ b/demo/Ursa.Demo/App.axaml
@@ -1,9 +1,10 @@
 <Application
     x:Class="Ursa.Demo.App"
     xmlns="https://github.com/avaloniaui"
-    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:u-semi="https://irihi.tech/ursa/themes/semi">
     <Application.Styles>
         <StyleInclude Source="avares://Semi.Avalonia/Themes/Index.axaml" />
-        <StyleInclude Source="avares://Ursa.Themes.Semi/Index.axaml" />
+        <u-semi:SemiTheme Locale="en-US"/>
     </Application.Styles>
 </Application>
\ No newline at end of file
diff --git a/demo/Ursa.Demo/ViewModels/MessageBoxDemoViewModel.cs b/demo/Ursa.Demo/ViewModels/MessageBoxDemoViewModel.cs
index 3bb7a45..e3a6d5c 100644
--- a/demo/Ursa.Demo/ViewModels/MessageBoxDemoViewModel.cs
+++ b/demo/Ursa.Demo/ViewModels/MessageBoxDemoViewModel.cs
@@ -115,7 +115,7 @@ public class MessageBoxDemoViewModel: ObservableObject
 
     private async Task OnOkCancelAsync()
     {
-        await Show(MessageBoxButton.OK);
+        await Show(MessageBoxButton.OKCancel);
     }
 
     private async Task Show(MessageBoxButton button)
diff --git a/src/Ursa.Themes.Semi/AssemblyInfo.cs b/src/Ursa.Themes.Semi/AssemblyInfo.cs
new file mode 100644
index 0000000..d15efbd
--- /dev/null
+++ b/src/Ursa.Themes.Semi/AssemblyInfo.cs
@@ -0,0 +1,4 @@
+using Avalonia.Metadata;
+
+[assembly:XmlnsPrefix("https://irihi.tech/ursa/themes/semi", "u-semi")]
+[assembly:XmlnsDefinition("https://irihi.tech/ursa/themes/semi", "Ursa.Themes.Semi")]
\ No newline at end of file
diff --git a/src/Ursa.Themes.Semi/Controls/Dialog.axaml b/src/Ursa.Themes.Semi/Controls/Dialog.axaml
index 3fa8557..48259aa 100644
--- a/src/Ursa.Themes.Semi/Controls/Dialog.axaml
+++ b/src/Ursa.Themes.Semi/Controls/Dialog.axaml
@@ -52,7 +52,7 @@
                     <MenuItem
                         Command="{Binding $parent[u:DialogControl].UpdateLayer}"
                         CommandParameter="{x:Static u:DialogLayerChangeType.BringForward}"
-                        Header="Bring Forward">
+                        Header="{DynamicResource STRING_MENU_BRING_FORWARD}">
                         <MenuItem.Icon>
                             <PathIcon
                                 Width="12"
@@ -63,7 +63,7 @@
                     <MenuItem
                         Command="{Binding $parent[u:DialogControl].UpdateLayer}"
                         CommandParameter="{x:Static u:DialogLayerChangeType.BringToFront}"
-                        Header="Bring To Front">
+                        Header="{DynamicResource STRING_MENU_BRING_TO_FRONT}">
                         <MenuItem.Icon>
                             <PathIcon
                                 Width="12"
@@ -74,7 +74,7 @@
                     <MenuItem
                         Command="{Binding $parent[u:DialogControl].UpdateLayer}"
                         CommandParameter="{x:Static u:DialogLayerChangeType.SendBackward}"
-                        Header="Send Backward">
+                        Header="{DynamicResource STRING_MENU_SEND_BACKWARD}">
                         <MenuItem.Icon>
                             <PathIcon
                                 Width="12"
@@ -85,7 +85,7 @@
                     <MenuItem
                         Command="{Binding $parent[u:DialogControl].UpdateLayer}"
                         CommandParameter="{x:Static u:DialogLayerChangeType.SendToBack}"
-                        Header="Send To Back">
+                        Header="{DynamicResource STRING_MENU_SEND_TO_BACK}">
                         <MenuItem.Icon>
                             <PathIcon
                                 Width="12"
@@ -161,24 +161,24 @@
                                     Name="{x:Static u:DefaultDialogControl.PART_CancelButton}"
                                     Margin="8,0,0,0"
                                     Classes="Tertiary"
-                                    Content="取消" />
+                                    Content="{DynamicResource STRING_MENU_DIALOG_CANCEL}" />
                                 <Button
                                     Name="{x:Static u:DefaultDialogControl.PART_NoButton}"
                                     Margin="8,0,0,0"
                                     Classes="Danger"
-                                    Content="否"
+                                    Content="{DynamicResource STRING_MENU_DIALOG_NO}"
                                     Theme="{DynamicResource SolidButton}" />
                                 <Button
                                     Name="{x:Static u:DefaultDialogControl.PART_YesButton}"
                                     Margin="8,0,0,0"
                                     Classes="Primary"
-                                    Content="是"
+                                    Content="{DynamicResource STRING_MENU_DIALOG_YES}"
                                     Theme="{DynamicResource SolidButton}" />
                                 <Button
                                     Name="{x:Static u:DefaultDialogControl.PART_OKButton}"
                                     Margin="8,0,0,0"
                                     Classes="Primary"
-                                    Content="确认"
+                                    Content="{DynamicResource STRING_MENU_DIALOG_OK}"
                                     Theme="{DynamicResource SolidButton}" />
                             </StackPanel>
                         </Grid>
@@ -311,7 +311,7 @@
                     <MenuItem
                         Command="{Binding $parent[u:DialogControl].UpdateLayer}"
                         CommandParameter="{x:Static u:DialogLayerChangeType.BringForward}"
-                        Header="Bring Forward">
+                        Header="{DynamicResource STRING_MENU_BRING_FORWARD}">
                         <MenuItem.Icon>
                             <PathIcon
                                 Width="12"
@@ -322,7 +322,7 @@
                     <MenuItem
                         Command="{Binding $parent[u:DialogControl].UpdateLayer}"
                         CommandParameter="{x:Static u:DialogLayerChangeType.BringToFront}"
-                        Header="Bring To Front">
+                        Header="{DynamicResource STRING_MENU_BRING_TO_FRONT}">
                         <MenuItem.Icon>
                             <PathIcon
                                 Width="12"
@@ -333,7 +333,7 @@
                     <MenuItem
                         Command="{Binding $parent[u:DialogControl].UpdateLayer}"
                         CommandParameter="{x:Static u:DialogLayerChangeType.SendBackward}"
-                        Header="Send Backward">
+                        Header="{DynamicResource STRING_MENU_SEND_BACKWARD}">
                         <MenuItem.Icon>
                             <PathIcon
                                 Width="12"
@@ -344,7 +344,7 @@
                     <MenuItem
                         Command="{Binding $parent[u:DialogControl].UpdateLayer}"
                         CommandParameter="{x:Static u:DialogLayerChangeType.SendToBack}"
-                        Header="Send To Back">
+                        Header="{DynamicResource STRING_MENU_SEND_TO_BACK}">
                         <MenuItem.Icon>
                             <PathIcon
                                 Width="12"
@@ -492,24 +492,24 @@
                                 Name="{x:Static u:DefaultDialogControl.PART_CancelButton}"
                                 Margin="8,0,0,0"
                                 Classes="Tertiary"
-                                Content="取消" />
+                                Content="{DynamicResource STRING_MENU_DIALOG_CANCEL}" />
                             <Button
                                 Name="{x:Static u:DefaultDialogControl.PART_NoButton}"
                                 Margin="8,0,0,0"
                                 Classes="Danger"
-                                Content="否"
+                                Content="{DynamicResource STRING_MENU_DIALOG_NO}"
                                 Theme="{DynamicResource SolidButton}" />
                             <Button
                                 Name="{x:Static u:DefaultDialogControl.PART_YesButton}"
                                 Margin="8,0,0,0"
                                 Classes="Primary"
-                                Content="是"
+                                Content="{DynamicResource STRING_MENU_DIALOG_YES}"
                                 Theme="{DynamicResource SolidButton}" />
                             <Button
                                 Name="{x:Static u:DefaultDialogControl.PART_OKButton}"
                                 Margin="8,0,0,0"
                                 Classes="Primary"
-                                Content="确认"
+                                Content="{DynamicResource STRING_MENU_DIALOG_OK}"
                                 Theme="{DynamicResource SolidButton}" />
                         </StackPanel>
                     </Grid>
diff --git a/src/Ursa.Themes.Semi/Controls/MessageBox.axaml b/src/Ursa.Themes.Semi/Controls/MessageBox.axaml
index a5d2d36..b79a3e0 100644
--- a/src/Ursa.Themes.Semi/Controls/MessageBox.axaml
+++ b/src/Ursa.Themes.Semi/Controls/MessageBox.axaml
@@ -88,24 +88,24 @@
                                 Name="{x:Static u:MessageBoxWindow.PART_CancelButton}"
                                 Margin="8,0,0,0"
                                 Classes="Tertiary"
-                                Content="Cancel" />
+                                Content="{DynamicResource STRING_MENU_DIALOG_CANCEL}" />
                             <Button
                                 Name="{x:Static u:MessageBoxWindow.PART_NoButton}"
                                 Margin="8,0,0,0"
                                 Classes="Danger"
-                                Content="No"
+                                Content="{DynamicResource STRING_MENU_DIALOG_NO}"
                                 Theme="{DynamicResource SolidButton}" />
                             <Button
                                 Name="{x:Static u:MessageBoxWindow.PART_YesButton}"
                                 Margin="8,0,0,0"
                                 Classes="Primary"
-                                Content="Yes"
+                                Content="{DynamicResource STRING_MENU_DIALOG_YES}"
                                 Theme="{DynamicResource SolidButton}" />
                             <Button
                                 Name="{x:Static u:MessageBoxWindow.PART_OKButton}"
                                 Margin="8,0,0,0"
                                 Classes="Primary"
-                                Content="OK"
+                                Content="{DynamicResource STRING_MENU_DIALOG_OK}"
                                 Theme="{DynamicResource SolidButton}" />
                         </StackPanel>
                     </Grid>
@@ -219,24 +219,24 @@
                                     Name="{x:Static u:MessageBoxControl.PART_CancelButton}"
                                     Margin="8,0,0,0"
                                     Classes="Tertiary"
-                                    Content="Cancel" />
+                                    Content="{DynamicResource STRING_MENU_DIALOG_CANCEL}" />
                                 <Button
                                     Name="{x:Static u:MessageBoxControl.PART_NoButton}"
                                     Margin="8,0,0,0"
                                     Classes="Danger"
-                                    Content="No"
+                                    Content="{DynamicResource STRING_MENU_DIALOG_NO}"
                                     Theme="{DynamicResource SolidButton}" />
                                 <Button
                                     Name="{x:Static u:MessageBoxControl.PART_YesButton}"
                                     Margin="8,0,0,0"
                                     Classes="Primary"
-                                    Content="Yes"
+                                    Content="{DynamicResource STRING_MENU_DIALOG_YES}"
                                     Theme="{DynamicResource SolidButton}" />
                                 <Button
                                     Name="{x:Static u:MessageBoxControl.PART_OKButton}"
                                     Margin="8,0,0,0"
                                     Classes="Primary"
-                                    Content="OK"
+                                    Content="{DynamicResource STRING_MENU_DIALOG_OK}"
                                     Theme="{DynamicResource SolidButton}" />
                             </StackPanel>
                         </Grid>
diff --git a/src/Ursa.Themes.Semi/Index.axaml b/src/Ursa.Themes.Semi/Index.axaml
index 6e94216..92b8e18 100644
--- a/src/Ursa.Themes.Semi/Index.axaml
+++ b/src/Ursa.Themes.Semi/Index.axaml
@@ -1,9 +1,4 @@
-<Styles xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
-    <Design.PreviewWith>
-        <Border Padding="20">
-            <!--  Add Controls for Previewer Here  -->
-        </Border>
-    </Design.PreviewWith>
+<Styles x:Class="Ursa.Themes.Semi.SemiTheme" xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
     <Styles.Resources>
         <ResourceDictionary>
             <ResourceDictionary.ThemeDictionaries>
@@ -13,11 +8,11 @@
             <ResourceDictionary.MergedDictionaries>
                 <ResourceInclude Source="../Controls/_index.axaml" />
                 <ResourceInclude Source="Themes/Shared/_index.axaml" />
+                <ResourceInclude Source="Locale/zh-cn.axaml" />
             </ResourceDictionary.MergedDictionaries>
         </ResourceDictionary>
     </Styles.Resources>
 
     <StyleInclude Source="../Styles/_index.axaml" />
-
     <!--  Add Styles Here  -->
 </Styles>
diff --git a/src/Ursa.Themes.Semi/Index.axaml.cs b/src/Ursa.Themes.Semi/Index.axaml.cs
new file mode 100644
index 0000000..c7945a9
--- /dev/null
+++ b/src/Ursa.Themes.Semi/Index.axaml.cs
@@ -0,0 +1,56 @@
+using System.Globalization;
+using System.Runtime.CompilerServices;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+using Avalonia.Markup.Xaml.Styling;
+using Avalonia.Platform;
+using Avalonia.Styling;
+
+namespace Ursa.Themes.Semi;
+
+public class SemiTheme: Styles
+{
+    private static readonly Dictionary<CultureInfo, string> _localeToResource = new()
+    {
+        { new CultureInfo("zh-CN"), "avares://Ursa.Themes.Semi/Locale/zh-CN.axaml" },
+        { new CultureInfo("en-US"), "avares://Ursa.Themes.Semi/Locale/en-US.axaml" },
+    };
+    
+    private readonly IServiceProvider? sp;
+    public SemiTheme(IServiceProvider? provider = null)
+    {
+        AvaloniaXamlLoader.Load(provider, this);
+    }
+
+    private CultureInfo? _locale;
+    public CultureInfo? Locale
+    {
+        get => _locale;
+        set
+        { 
+            _locale = value;
+            var resource = TryGetLocaleResource(value);
+            var d = AvaloniaXamlLoader.Load(sp, new Uri(resource)) as ResourceDictionary;
+            if (d is null) return;
+            foreach (var kv in d)
+            {
+                this.Resources.Add(kv);
+            }
+        }
+    }
+    
+    private static string TryGetLocaleResource(CultureInfo? locale)
+    {
+        if (locale is null)
+        {
+            return _localeToResource[new CultureInfo("zh-CN")];
+        }
+
+        if (_localeToResource.TryGetValue(locale, out var resource))
+        {
+            return resource;
+        }
+        return _localeToResource[new CultureInfo("zh-CN")];
+    }
+}
\ No newline at end of file
diff --git a/src/Ursa.Themes.Semi/Locale/en-us.axaml b/src/Ursa.Themes.Semi/Locale/en-us.axaml
new file mode 100644
index 0000000..d294cd0
--- /dev/null
+++ b/src/Ursa.Themes.Semi/Locale/en-us.axaml
@@ -0,0 +1,12 @@
+<ResourceDictionary xmlns="https://github.com/avaloniaui"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <!-- Add Resources Here -->
+    <x:String x:Key="STRING_MENU_BRING_TO_FRONT">Bring to Front</x:String>
+    <x:String x:Key="STRING_MENU_BRING_FORWARD">Bring Forward</x:String>
+    <x:String x:Key="STRING_MENU_SEND_BACKWARD">Send Backward</x:String>
+    <x:String x:Key="STRING_MENU_SEND_TO_BACK">Send to Back</x:String>
+    <x:String x:Key="STRING_MENU_DIALOG_OK">OK</x:String>
+    <x:String x:Key="STRING_MENU_DIALOG_CANCEL">Cancel</x:String>
+    <x:String x:Key="STRING_MENU_DIALOG_YES">Yes</x:String>
+    <x:String x:Key="STRING_MENU_DIALOG_NO">No</x:String>
+</ResourceDictionary>
diff --git a/src/Ursa.Themes.Semi/Locale/zh-cn.axaml b/src/Ursa.Themes.Semi/Locale/zh-cn.axaml
new file mode 100644
index 0000000..ca25cd0
--- /dev/null
+++ b/src/Ursa.Themes.Semi/Locale/zh-cn.axaml
@@ -0,0 +1,12 @@
+<ResourceDictionary xmlns="https://github.com/avaloniaui"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <!-- Add Resources Here -->
+    <x:String x:Key="STRING_MENU_BRING_TO_FRONT">置于顶层</x:String>
+    <x:String x:Key="STRING_MENU_BRING_FORWARD">上移一层</x:String>
+    <x:String x:Key="STRING_MENU_SEND_BACKWARD">下移一层</x:String>
+    <x:String x:Key="STRING_MENU_SEND_TO_BACK">置于底层</x:String>
+    <x:String x:Key="STRING_MENU_DIALOG_OK">确认</x:String>
+    <x:String x:Key="STRING_MENU_DIALOG_CANCEL">取消</x:String>
+    <x:String x:Key="STRING_MENU_DIALOG_YES">是</x:String>
+    <x:String x:Key="STRING_MENU_DIALOG_NO">否</x:String>
+</ResourceDictionary>