Add localization file and settings (debug only)

StabilityMatrix.Avalonia/App.axaml.cs

@@ -34,11 +34,13 @@ using Sentry;
 using StabilityMatrix.Avalonia.Controls;
 using StabilityMatrix.Avalonia.DesignData;
 using StabilityMatrix.Avalonia.Helpers;
+using StabilityMatrix.Avalonia.Languages;
 using StabilityMatrix.Avalonia.Models;
 using StabilityMatrix.Avalonia.Services;
 using StabilityMatrix.Avalonia.ViewModels;
 using StabilityMatrix.Avalonia.ViewModels.Base;
 using StabilityMatrix.Avalonia.ViewModels.CheckpointBrowser;
+using StabilityMatrix.Avalonia.ViewModels.CheckpointManager;
 using StabilityMatrix.Avalonia.ViewModels.Dialogs;
 using StabilityMatrix.Avalonia.ViewModels.PackageManager;
 using StabilityMatrix.Avalonia.Views;
@@ -57,8 +59,7 @@ using StabilityMatrix.Core.Python;
 using StabilityMatrix.Core.Services;
 using StabilityMatrix.Core.Updater;
 using Application = Avalonia.Application;
-using CheckpointFile = StabilityMatrix.Avalonia.ViewModels.CheckpointManager.CheckpointFile;
-using CheckpointFolder = StabilityMatrix.Avalonia.ViewModels.CheckpointManager.CheckpointFolder;
+using Language = StabilityMatrix.Avalonia.Languages.Language;
 using LogLevel = Microsoft.Extensions.Logging.LogLevel;
 
 namespace StabilityMatrix.Avalonia;
@@ -194,7 +195,12 @@ public sealed class App : Application
         Services = services.BuildServiceProvider();
         
         var settingsManager = Services.GetRequiredService<ISettingsManager>();
-        settingsManager.TryFindLibrary();
+        
+        if (settingsManager.TryFindLibrary())
+        {
+            Cultures.TrySetSupportedCulture(settingsManager.Settings.Language);
+        }
+        
         Services.GetRequiredService<ProgressManagerViewModel>().StartEventListener();
     }
 

StabilityMatrix.Avalonia/Controls/AutoGrid.cs

@@ -0,0 +1,408 @@
+// Modified from https://github.com/AvaloniaUI/AvaloniaAutoGrid
+/*The MIT License (MIT)
+
+Copyright (c) 2013 Charles Brown (carbonrobot)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.*/
+
+using System;
+using System.ComponentModel;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Data;
+using Avalonia.Layout;
+
+namespace StabilityMatrix.Avalonia.Controls;
+
+/// <summary>
+/// Defines a flexible grid area that consists of columns and rows.
+/// Depending on the orientation, either the rows or the columns are auto-generated,
+/// and the children's position is set according to their index.
+/// </summary>
+[SuppressMessage("ReSharper", "MemberCanBePrivate.Global")]
+public class AutoGrid : Grid
+{
+    /// <summary>
+    /// Gets or sets the child horizontal alignment.
+    /// </summary>
+    /// <value>The child horizontal alignment.</value>
+    [Category("Layout"), Description("Presets the horizontal alignment of all child controls")]
+    public HorizontalAlignment? ChildHorizontalAlignment
+    {
+        get => (HorizontalAlignment?)GetValue(ChildHorizontalAlignmentProperty);
+        set => SetValue(ChildHorizontalAlignmentProperty, value);
+    }
+
+    /// <summary>
+    /// Gets or sets the child margin.
+    /// </summary>
+    /// <value>The child margin.</value>
+    [Category("Layout"), Description("Presets the margin of all child controls")]
+    public Thickness? ChildMargin
+    {
+        get => (Thickness?)GetValue(ChildMarginProperty);
+        set => SetValue(ChildMarginProperty, value);
+    }
+
+    /// <summary>
+    /// Gets or sets the child vertical alignment.
+    /// </summary>
+    /// <value>The child vertical alignment.</value>
+    [Category("Layout"), Description("Presets the vertical alignment of all child controls")]
+    public VerticalAlignment? ChildVerticalAlignment
+    {
+        get => (VerticalAlignment?)GetValue(ChildVerticalAlignmentProperty);
+        set => SetValue(ChildVerticalAlignmentProperty, value);
+    }
+
+    /// <summary>
+    /// Gets or sets the column count
+    /// </summary>
+    [Category("Layout"), Description("Defines a set number of columns")]
+    public int ColumnCount
+    {
+        get => (int)GetValue(ColumnCountProperty)!;
+        set => SetValue(ColumnCountProperty, value);
+    }
+
+    /// <summary>
+    /// Gets or sets the fixed column width
+    /// </summary>
+    [Category("Layout"), Description("Presets the width of all columns set using the ColumnCount property")]
+
+    public GridLength ColumnWidth
+    {
+        get => (GridLength)GetValue(ColumnWidthProperty)!;
+        set => SetValue(ColumnWidthProperty, value);
+    }
+
+    /// <summary>
+    /// Gets or sets a value indicating whether the children are automatically indexed.
+    /// <remarks>
+    /// The default is <c>true</c>.
+    /// Note that if children are already indexed, setting this property to <c>false</c> will not remove their indices.
+    /// </remarks>
+    /// </summary>
+    [Category("Layout"), Description("Set to false to disable the auto layout functionality")]
+    public bool IsAutoIndexing
+    {
+        get => (bool)GetValue(IsAutoIndexingProperty)!;
+        set => SetValue(IsAutoIndexingProperty, value);
+    }
+
+    /// <summary>
+    /// Gets or sets the orientation.
+    /// <remarks>The default is Vertical.</remarks>
+    /// </summary>
+    /// <value>The orientation.</value>
+    [Category("Layout"), Description("Defines the directionality of the autolayout. Use vertical for a column first layout, horizontal for a row first layout.")]
+    public Orientation Orientation
+    {
+        get => (Orientation)GetValue(OrientationProperty)!;
+        set => SetValue(OrientationProperty, value);
+    }
+
+    /// <summary>
+    /// Gets or sets the number of rows
+    /// </summary>
+    [Category("Layout"), Description("Defines a set number of rows")]
+    public int RowCount
+    {
+        get => (int)GetValue(RowCountProperty)!;
+        set => SetValue(RowCountProperty, value);
+    }
+
+    /// <summary>
+    /// Gets or sets the fixed row height
+    /// </summary>
+    [Category("Layout"), Description("Presets the height of all rows set using the RowCount property")]
+    public GridLength RowHeight
+    {
+        get => (GridLength)GetValue(RowHeightProperty)!;
+        set => SetValue(RowHeightProperty, value);
+    }
+        
+    /// <summary>
+    /// Handles the column count changed event
+    /// </summary>
+    public static void ColumnCountChanged(AvaloniaPropertyChangedEventArgs e)
+    {
+        if ((int)e.NewValue! < 0)
+            return;
+
+        var grid = (AutoGrid)e.Sender;
+
+            
+        // look for an existing column definition for the height
+        var width = grid.ColumnWidth;
+        if (!grid.IsSet(ColumnWidthProperty) && grid.ColumnDefinitions.Count > 0)
+            width = grid.ColumnDefinitions[0].Width;
+
+        // clear and rebuild
+        grid.ColumnDefinitions.Clear();
+        for (var i = 0; i < (int)e.NewValue; i++)
+            grid.ColumnDefinitions.Add(
+                new ColumnDefinition() { Width = width });
+    }
+
+    /// <summary>
+    /// Handle the fixed column width changed event
+    /// </summary>
+    public static void FixedColumnWidthChanged(AvaloniaPropertyChangedEventArgs e)
+    {
+        var grid = (AutoGrid)e.Sender;
+
+        // add a default column if missing
+        if (grid.ColumnDefinitions.Count == 0)
+            grid.ColumnDefinitions.Add(new ColumnDefinition());
+
+        // set all existing columns to this width
+        foreach (var t in grid.ColumnDefinitions)
+            t.Width = (GridLength)e.NewValue!;
+    }
+
+    /// <summary>
+    /// Handle the fixed row height changed event
+    /// </summary>
+    public static void FixedRowHeightChanged(AvaloniaPropertyChangedEventArgs e)
+    {
+        var grid = (AutoGrid)e.Sender;
+
+        // add a default row if missing
+        if (grid.RowDefinitions.Count == 0)
+            grid.RowDefinitions.Add(new RowDefinition());
+
+        // set all existing rows to this height
+        foreach (var t in grid.RowDefinitions)
+            t.Height = (GridLength)e.NewValue!;
+    }
+
+    /// <summary>
+    /// Handles the row count changed event
+    /// </summary>
+    public static void RowCountChanged(AvaloniaPropertyChangedEventArgs e)
+    {
+        if ((int)e.NewValue! < 0)
+            return;
+
+        var grid = (AutoGrid)e.Sender;
+
+        // look for an existing row to get the height
+        var height = grid.RowHeight;
+        if (!grid.IsSet(RowHeightProperty) && grid.RowDefinitions.Count > 0)
+            height = grid.RowDefinitions[0].Height;
+
+        // clear and rebuild
+        grid.RowDefinitions.Clear();
+        for (var i = 0; i < (int)e.NewValue; i++)
+            grid.RowDefinitions.Add(
+                new RowDefinition() { Height = height });
+    }
+
+    /// <summary>
+    /// Called when [child horizontal alignment changed].
+    /// </summary>
+    private static void OnChildHorizontalAlignmentChanged(AvaloniaPropertyChangedEventArgs e)
+    {
+        var grid = (AutoGrid)e.Sender;
+        foreach (var child in grid.Children)
+        {
+            child.SetValue(HorizontalAlignmentProperty,
+                grid.ChildHorizontalAlignment ?? AvaloniaProperty.UnsetValue);
+        }
+    }
+
+    /// <summary>
+    /// Called when [child layout changed].
+    /// </summary>
+    private static void OnChildMarginChanged(AvaloniaPropertyChangedEventArgs e)
+    {
+        var grid = (AutoGrid)e.Sender;
+        foreach (var child in grid.Children)
+        {
+            child.SetValue(MarginProperty, grid.ChildMargin ?? AvaloniaProperty.UnsetValue);
+        }
+    }
+
+    /// <summary>
+    /// Called when [child vertical alignment changed].
+    /// </summary>
+    private static void OnChildVerticalAlignmentChanged(AvaloniaPropertyChangedEventArgs e)
+    {
+        var grid = (AutoGrid)e.Sender;
+        foreach (var child in grid.Children)
+        {
+            child.SetValue(VerticalAlignmentProperty, grid.ChildVerticalAlignment ?? AvaloniaProperty.UnsetValue);
+        }
+    }
+
+    /// <summary>
+    /// Apply child margins and layout effects such as alignment
+    /// </summary>
+    private void ApplyChildLayout(Control child)
+    {
+        if (ChildMargin != null)
+        {
+            child.SetValue(MarginProperty, ChildMargin.Value, BindingPriority.Template);
+        }
+        if (ChildHorizontalAlignment != null)
+        {
+            child.SetValue(HorizontalAlignmentProperty, ChildHorizontalAlignment.Value, BindingPriority.Template);
+        }
+        if (ChildVerticalAlignment != null)
+        {
+            child.SetValue(VerticalAlignmentProperty, ChildVerticalAlignment.Value, BindingPriority.Template);
+        }
+    }
+
+    /// <summary>
+    /// Clamp a value to its maximum.
+    /// </summary>
+    private int Clamp(int value, int max)
+    {
+        return (value > max) ? max : value;
+    }
+
+    /// <summary>
+    /// Perform the grid layout of row and column indexes
+    /// </summary>
+    private void PerformLayout()
+    {
+        var fillRowFirst = Orientation == Orientation.Horizontal;
+        var rowCount = RowDefinitions.Count;
+        var colCount = ColumnDefinitions.Count;
+
+        if (rowCount == 0 || colCount == 0)
+            return;
+
+        var position = 0;
+        var skip = new bool[rowCount, colCount];
+        foreach (var child in Children.OfType<Control>())
+        {
+            var childIsCollapsed = !child.IsVisible;
+            if (IsAutoIndexing && !childIsCollapsed)
+            {
+                if (fillRowFirst)
+                {
+                    var row = Clamp(position / colCount, rowCount - 1);
+                    var col = Clamp(position % colCount, colCount - 1);
+                    if (skip[row, col])
+                    {
+                        position++;
+                        row = (position / colCount);
+                        col = (position % colCount);
+                    }
+
+                    SetRow(child, row);
+                    SetColumn(child, col);
+                    position += GetColumnSpan(child);
+
+                    var offset = GetRowSpan(child) - 1;
+                    while (offset > 0)
+                    {
+                        skip[row + offset--, col] = true;
+                    }
+                }
+                else
+                {
+                    var row = Clamp(position % rowCount, rowCount - 1);
+                    var col = Clamp(position / rowCount, colCount - 1);
+                    if (skip[row, col])
+                    {
+                        position++;
+                        row = position % rowCount;
+                        col = position / rowCount;
+                    }
+
+                    SetRow(child, row);
+                    SetColumn(child, col);
+                    position += GetRowSpan(child);
+
+                    var offset = GetColumnSpan(child) - 1;
+                    while (offset > 0)
+                    {
+                        skip[row, col + offset--] = true;
+                    }
+                }
+            }
+
+            ApplyChildLayout(child);
+        }
+    }
+
+    public static readonly AvaloniaProperty<HorizontalAlignment?> ChildHorizontalAlignmentProperty =
+        AvaloniaProperty.Register<AutoGrid, HorizontalAlignment?>("ChildHorizontalAlignment");
+
+    public static readonly AvaloniaProperty<Thickness?> ChildMarginProperty =
+        AvaloniaProperty.Register<AutoGrid, Thickness?>("ChildMargin");
+
+    public static readonly AvaloniaProperty<VerticalAlignment?> ChildVerticalAlignmentProperty =
+        AvaloniaProperty.Register<AutoGrid, VerticalAlignment?>("ChildVerticalAlignment");
+
+    public static readonly AvaloniaProperty<int> ColumnCountProperty =
+        AvaloniaProperty.RegisterAttached<Control, int>("ColumnCount", typeof(AutoGrid), 1);
+
+    public static readonly AvaloniaProperty<GridLength> ColumnWidthProperty =
+        AvaloniaProperty.RegisterAttached<Control, GridLength>("ColumnWidth", typeof(AutoGrid), GridLength.Auto);
+
+    public static readonly AvaloniaProperty<bool> IsAutoIndexingProperty =
+        AvaloniaProperty.Register<AutoGrid, bool>("IsAutoIndexing", true);
+
+    public static readonly AvaloniaProperty<Orientation> OrientationProperty =
+        AvaloniaProperty.Register<AutoGrid, Orientation>("Orientation", Orientation.Vertical);
+
+    public static readonly AvaloniaProperty<int> RowCountProperty =
+        AvaloniaProperty.RegisterAttached<Control, int>("RowCount", typeof(AutoGrid), 1);
+
+    public static readonly AvaloniaProperty<GridLength> RowHeightProperty =
+        AvaloniaProperty.RegisterAttached<Control, GridLength>("RowHeight", typeof(AutoGrid), GridLength.Auto);
+
+    static AutoGrid()
+    {
+        AffectsMeasure<AutoGrid>(ChildHorizontalAlignmentProperty, ChildMarginProperty,
+            ChildVerticalAlignmentProperty, ColumnCountProperty, ColumnWidthProperty, IsAutoIndexingProperty, OrientationProperty,
+            RowHeightProperty);
+            
+        ChildHorizontalAlignmentProperty.Changed.Subscribe(OnChildHorizontalAlignmentChanged);
+        ChildMarginProperty.Changed.Subscribe(OnChildMarginChanged);
+        ChildVerticalAlignmentProperty.Changed.Subscribe(OnChildVerticalAlignmentChanged);
+        ColumnCountProperty.Changed.Subscribe(ColumnCountChanged);
+        RowCountProperty.Changed.Subscribe(RowCountChanged);
+        ColumnWidthProperty.Changed.Subscribe(FixedColumnWidthChanged);
+        RowHeightProperty.Changed.Subscribe(FixedRowHeightChanged);
+    }
+    
+    #region Overrides
+
+    /// <summary>
+    /// Measures the children of a <see cref="T:System.Windows.Controls.Grid"/> in anticipation of arranging them during the <see cref="M:ArrangeOverride"/> pass.
+    /// </summary>
+    /// <param name="constraint">Indicates an upper limit size that should not be exceeded.</param>
+    /// <returns>
+    /// 	<see cref="Size"/> that represents the required size to arrange child content.
+    /// </returns>
+    protected override Size MeasureOverride(Size constraint)
+    {
+        PerformLayout();
+        return base.MeasureOverride(constraint);
+    }
+        
+    #endregion Overrides
+}

StabilityMatrix.Avalonia/Languages/Cultures.cs

@@ -0,0 +1,52 @@
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
+
+namespace StabilityMatrix.Avalonia.Languages;
+
+[SuppressMessage("ReSharper", "MemberCanBePrivate.Global")]
+public static class Cultures
+{
+    public static CultureInfo Default { get; } = new("en-US");
+
+    public static CultureInfo Current => Resources.Culture;
+    
+    public static readonly Dictionary<string, CultureInfo> SupportedCulturesByCode =
+        new Dictionary<string, CultureInfo>
+        {
+            ["en-US"] = Default,
+            ["ja-JP"] = new("ja-JP")
+        };
+
+    public static IReadOnlyList<CultureInfo> SupportedCultures 
+        => SupportedCulturesByCode.Values.ToImmutableList();
+    
+    public static CultureInfo GetSupportedCultureOrDefault(string? cultureCode)
+    {
+        if (cultureCode is null 
+            || !SupportedCulturesByCode.TryGetValue(cultureCode, out var culture))
+        {
+            return Default;
+        }
+        
+        return culture;
+    }
+    
+    public static bool TrySetSupportedCulture(string? cultureCode)
+    {
+        if (cultureCode is null 
+            || !SupportedCulturesByCode.TryGetValue(cultureCode, out var culture))
+        {
+            return false;
+        }
+
+        Resources.Culture = culture;
+        return true;
+    }
+    
+    public static bool TrySetSupportedCulture(CultureInfo? cultureInfo)
+    {
+        return cultureInfo is not null && TrySetSupportedCulture(cultureInfo.Name);
+    }
+}

StabilityMatrix.Avalonia/Languages/Resources.ja-JP.resx

@@ -0,0 +1,23 @@
+<root>
+    <resheader name="resmimetype">
+        <value>text/microsoft-resx</value>
+    </resheader>
+    <resheader name="version">
+        <value>1.3</value>
+    </resheader>
+    <resheader name="reader">
+        <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    </resheader>
+    <resheader name="writer">
+        <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    </resheader>
+    <data name="Action_Save" xml:space="preserve">
+        <value>保存</value>
+    </data>
+    <data name="Action_Cancel" xml:space="preserve">
+        <value>戻る</value>
+    </data>
+    <data name="Label_Language" xml:space="preserve">
+        <value>言語</value>
+    </data>
+</root>

StabilityMatrix.Avalonia/Languages/Resources.resx

@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<root>
+    <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+        <xsd:element name="root" msdata:IsDataSet="true">
+            
+        </xsd:element>
+    </xsd:schema>
+    <resheader name="resmimetype">
+        <value>text/microsoft-resx</value>
+    </resheader>
+    <resheader name="version">
+        <value>1.3</value>
+    </resheader>
+    <resheader name="reader">
+        <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    </resheader>
+    <resheader name="writer">
+        <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    </resheader>
+    <data name="Action_Launch" xml:space="preserve">
+        <value>Launch</value>
+    </data>
+    <data name="Action_Quit" xml:space="preserve">
+        <value>Quit</value>
+    </data>
+    <data name="Action_Save" xml:space="preserve">
+        <value>Save</value>
+    </data>
+    <data name="Action_Cancel" xml:space="preserve">
+        <value>Cancel</value>
+    </data>
+    <data name="Label_Language" xml:space="preserve">
+        <value>Language</value>
+    </data>
+    <data name="Text_RelaunchRequiredToApplyLanguage" xml:space="preserve">
+        <value>Relaunch is required for new language option to take effect</value>
+    </data>
+    <data name="Action_Relaunch" xml:space="preserve">
+        <value>Relaunch</value>
+    </data>
+    <data name="Action_RelaunchLater" xml:space="preserve">
+        <value>Relaunch Later</value>
+    </data>
+    <data name="Label_RelaunchRequired" xml:space="preserve">
+        <value>Relaunch Required</value>
+    </data>
+</root>

StabilityMatrix.Avalonia/StabilityMatrix.Avalonia.csproj

@@ -76,4 +76,20 @@
       <!-- Only for linux-64 -->
       <AvaloniaResource Include="Assets\linux-x64\**" Condition="'$(RuntimeIdentifier)' == 'linux-x64'" />
     </ItemGroup>
+    
+    <ItemGroup>
+      <EmbeddedResource Update="Languages\Resources.resx">
+        <Generator>PublicResXFileCodeGenerator</Generator>
+        <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+      </EmbeddedResource>
+    </ItemGroup>
+    
+    <ItemGroup>
+      <Compile Update="Languages\Resources.Designer.cs">
+        <DesignTime>True</DesignTime>
+        <AutoGen>True</AutoGen>
+        <DependentUpon>Resources.resx</DependentUpon>
+      </Compile>
+      <Compile Remove="Languages\LocalizationExtension.cs" />
+    </ItemGroup>
 </Project>

StabilityMatrix.Avalonia/ViewModels/SettingsViewModel.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.ComponentModel;
 using System.Diagnostics;
+using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Reflection;
@@ -12,12 +13,14 @@ using System.Threading.Tasks;
 using Avalonia;
 using Avalonia.Controls.Notifications;
 using Avalonia.Styling;
+using Avalonia.Threading;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
 using FluentAvalonia.UI.Controls;
 using NLog;
 using StabilityMatrix.Avalonia.Controls;
 using StabilityMatrix.Avalonia.Helpers;
+using StabilityMatrix.Avalonia.Languages;
 using StabilityMatrix.Avalonia.Models;
 using StabilityMatrix.Avalonia.Services;
 using StabilityMatrix.Avalonia.ViewModels.Base;
@@ -67,6 +70,11 @@ public partial class SettingsViewModel : PageViewModelBase
         "System",
     };
 
+    [ObservableProperty] private CultureInfo selectedLanguage;
+
+    // ReSharper disable once MemberCanBeMadeStatic.Global
+    public IReadOnlyList<CultureInfo> AvailableLanguages => Cultures.SupportedCultures;
+
     public IReadOnlyList<float> AnimationScaleOptions { get; } = new[]
     {
         0f,
@@ -118,6 +126,7 @@ public partial class SettingsViewModel : PageViewModelBase
         SharedState = sharedState;
         
         SelectedTheme = settingsManager.Settings.Theme ?? AvailableThemes[1];
+        SelectedLanguage = Cultures.GetSupportedCultureOrDefault(settingsManager.Settings.Language);
         RemoveSymlinksOnShutdown = settingsManager.Settings.RemoveFolderLinksOnShutdown;
         SelectedAnimationScale = settingsManager.Settings.AnimationScale;
         
@@ -146,6 +155,43 @@ public partial class SettingsViewModel : PageViewModelBase
             _ => ThemeVariant.Default
         };
     }
+
+    partial void OnSelectedLanguageChanged(CultureInfo? oldValue, CultureInfo newValue)
+    {
+        if (oldValue is null || newValue.Name == Cultures.Current.Name) return;
+        // Set locale
+        if (AvailableLanguages.Contains(newValue))
+        {
+            Logger.Info("Changing language from {Old} to {New}", 
+                oldValue, newValue);
+
+            Cultures.TrySetSupportedCulture(newValue);
+            settingsManager.Transaction(s => s.Language = newValue.Name);
+            
+            var dialog = new BetterContentDialog
+            {
+                Title = Resources.Label_RelaunchRequired,
+                Content = Resources.Text_RelaunchRequiredToApplyLanguage,
+                DefaultButton = ContentDialogButton.Primary,
+                PrimaryButtonText = Resources.Action_Relaunch,
+                CloseButtonText = Resources.Action_RelaunchLater
+            };
+
+            Dispatcher.UIThread.InvokeAsync(async () =>
+            {
+                if (await dialog.ShowAsync() == ContentDialogResult.Primary)
+                {
+                    Process.Start(Compat.AppCurrentPath);
+                    App.Shutdown();
+                }
+            });
+        }
+        else
+        {
+            Logger.Info("Requested invalid language change from {Old} to {New}", 
+                oldValue, newValue);
+        }
+    }
     
     partial void OnRemoveSymlinksOnShutdownChanged(bool value)
     {

StabilityMatrix.Avalonia/Views/SettingsPage.axaml

@@ -1,342 +1,368 @@
-<controls:UserControlBase xmlns="https://github.com/avaloniaui"
-             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
-             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:vm="clr-namespace:StabilityMatrix.Avalonia.ViewModels"
-             xmlns:ui="using:FluentAvalonia.UI.Controls"
-             xmlns:mocks="clr-namespace:StabilityMatrix.Avalonia.DesignData"
-             xmlns:controls="clr-namespace:StabilityMatrix.Avalonia.Controls"
-             xmlns:avalonia="clr-namespace:Projektanker.Icons.Avalonia;assembly=Projektanker.Icons.Avalonia"
-             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="700"
-             x:DataType="vm:SettingsViewModel"
-             x:CompileBindings="True"
-             d:DataContext="{x:Static mocks:DesignData.SettingsViewModel}"
-             x:Class="StabilityMatrix.Avalonia.Views.SettingsPage">
-    
-    <Grid>
-        <ScrollViewer VerticalScrollBarVisibility="Auto">
-            <Grid RowDefinitions="Auto, Auto, Auto, Auto, Auto, Auto, Auto, Auto"
-                  Margin="8, 16">
-                    <!-- Theme -->
-                    <Grid Grid.Row="0" RowDefinitions="auto,*">
-                        <TextBlock 
-                            FontWeight="Medium"
-                            Text="Appearance" 
-                            Margin="0,0,0,8" />
-                            <ui:SettingsExpander 
-                                Grid.Row="1"
-                                Header="Theme" 
-                                IconSource="WeatherMoon"
-                                Margin="8,0,8,4">
-                                <ui:SettingsExpander.Footer>
-                                    <ComboBox
-                                        ItemsSource="{Binding AvailableThemes}"
-                                        SelectedItem="{Binding SelectedTheme}"
-                                        MinWidth="100"/>
-                                </ui:SettingsExpander.Footer>
-                            </ui:SettingsExpander>
-                    </Grid>
-                    
-                    <!--  TODO: Text2Image host port settings  -->
-                    
-                    <!-- Checkpoints Manager Options -->
-                    <Grid Grid.Row="1" Margin="0,8,0,0" RowDefinitions="auto,*,Auto">
-                        <TextBlock 
-                            FontWeight="Medium"
-                            Text="Checkpoint Manager" 
-                            Margin="0,0,0,8" />
-                        <ui:SettingsExpander
-                            Grid.Row="1"
-                            IconSource="Folder"
-                            Header="Remove shared checkpoints directory symbolic links on shutdown"
-                            Description="Select this option if you're having problems moving Stability Matrix to another drive"
-                            Margin="8,0">
-                            <ui:SettingsExpander.Footer>
-                                <CheckBox Margin="8"
-                                          IsChecked="{Binding RemoveSymlinksOnShutdown}"/>
-                            </ui:SettingsExpander.Footer>
-                        </ui:SettingsExpander>
-                        <ui:SettingsExpander
-                            Grid.Row="2"
-                            IconSource="Refresh"
-                            Header="Reset Checkpoints Cache"
-                            Description="Rebuilds the installed checkpoints cache. Use if checkpoints are incorrectly labeled in the Model Browser."
-                            Margin="8, 4">
-                            <ui:SettingsExpander.Footer>
-                                <Button Command="{Binding ResetCheckpointCache}"
-                                        Content="Reset Checkpoints Cache"/>
-                            </ui:SettingsExpander.Footer>
-                        </ui:SettingsExpander>
-                    </Grid>
-                    
-                    <!-- Environment Options -->
-                    <Grid Grid.Row="2" Margin="0,8,0,0" RowDefinitions="Auto, Auto, Auto">
-                        <TextBlock 
-                            FontWeight="Medium"
-                            Text="Package Environment" 
-                            Margin="0,0,0,8" />
-                        
-                            <ui:SettingsExpander Grid.Row="1"
-                                Header="Environment Variables"
-                                IconSource="OtherUser"
-                                Margin="8,0">
-                                <ui:SettingsExpander.Footer>
-                                    <Button Content="Edit"
-                                            Command="{Binding OpenEnvVarsDialogCommand}"/>
-                                </ui:SettingsExpander.Footer>
-                            </ui:SettingsExpander>
-                        
-                            <ui:SettingsExpander Grid.Row="2"
-                                Header="Embedded Python"
-                                Margin="8,4">
-                                <ui:SettingsExpander.IconSource>
-                                    <controls:FASymbolIconSource Symbol="fa-brands fa-python"/>
-                                </ui:SettingsExpander.IconSource>
-                                <ui:SettingsExpander.Footer>
-                                    <StackPanel Orientation="Horizontal" Spacing="16">
-                                        <controls:ProgressRing 
-                                            IsEnabled="{Binding CheckPythonVersionCommand.IsRunning}"
-                                            IsVisible="{Binding CheckPythonVersionCommand.IsRunning}"
-                                            IsIndeterminate="True" 
-                                            BorderThickness="3"/>
-                                        <Button Content="Check Version" Command="{Binding CheckPythonVersionCommand}"/>
-                                    </StackPanel>
-                                </ui:SettingsExpander.Footer>
-                            </ui:SettingsExpander>
-                    </Grid>
-                    
-                    <!-- Integrations -->
-                    <Grid Grid.Row="3" Margin="0,8,0,0" RowDefinitions="auto,*">
-                        <TextBlock 
-                            FontWeight="Medium"
-                            Text="Integrations" 
-                            Margin="0,0,0,8" />
-                        <ui:SettingsExpander  Grid.Row="1"
-                            Header="Discord Rich Presence" 
-                            Margin="8,0,8,4">
-                            <ui:SettingsExpander.IconSource>
-                                <controls:FASymbolIconSource Symbol="fa-brands fa-discord"/>
-                            </ui:SettingsExpander.IconSource>
-                            <ui:SettingsExpander.Footer>
-                                <ToggleSwitch
-                                    IsChecked="{Binding IsDiscordRichPresenceEnabled}" />
-                            </ui:SettingsExpander.Footer>
-                        </ui:SettingsExpander>
-                    </Grid>
-                    
-                    <!-- System Options -->
-                    <Grid Grid.Row="4" Margin="0,8,0,0" RowDefinitions="auto, auto, auto">
-                        <TextBlock 
-                            FontWeight="Medium"
-                            Text="System" 
-                            Margin="0,0,0,8" />
-                        <ui:SettingsExpander
-                            Grid.Row="1"
-                            ToolTip.Tip="{OnPlatform Default='Only available on Windows', Windows={x:Null}}"
-                            Header="Add Stability Matrix to the Start Menu"
-                            Description="Uses the current app location, you can run this again if you move the app"
-                            IconSource="StarAdd"
-                            Margin="8,0,8,4">
-                            <ui:SettingsExpander.Footer>
-                                <StackPanel Orientation="Horizontal" Spacing="8">
-                                    <controls:ProgressRing 
-                                        IsIndeterminate="True" 
-                                        IsEnabled="{Binding IsVisible, RelativeSource={RelativeSource Self}}"
-                                        BorderThickness="3">
-                                        <controls:ProgressRing.IsVisible>
-                                            <MultiBinding Converter="{x:Static BoolConverters.Or}">
-                                                <Binding Path="AddToStartMenuCommand.IsRunning"/>
-                                                <Binding Path="AddToGlobalStartMenuCommand.IsRunning"/>
-                                            </MultiBinding>
-                                        </controls:ProgressRing.IsVisible>
-                                    </controls:ProgressRing>
-                                    
-                                    <SplitButton 
-                                        Command="{Binding AddToStartMenuCommand}"
-                                        IsEnabled="{OnPlatform Default=False, Windows=True}"
-                                        Content="Add for Current User">
-                                        <SplitButton.Flyout>
-                                            <ui:FAMenuFlyout Placement="Bottom">
-                                                <ui:MenuFlyoutItem 
-                                                    Command="{Binding AddToGlobalStartMenuCommand}"
-                                                    IconSource="Admin" 
-                                                    Text="Add for All Users"/>
-                                            </ui:FAMenuFlyout>
-                                        </SplitButton.Flyout>
-                                    </SplitButton>
-                                </StackPanel>
-                            </ui:SettingsExpander.Footer>
-                        </ui:SettingsExpander>
-                        <ui:SettingsExpander Grid.Row="2"
-                                             Header="Select New Data Directory"
-                                             Description="Does not move existing data"
-                                             IconSource="MoveToFolder"
-                                             Margin="8,0">
-                            <ui:SettingsExpander.Footer>
-                                <Button Command="{Binding PickNewDataDirectory}">
-                                    <Grid ColumnDefinitions="Auto, Auto">
-                                        <avalonia:Icon Grid.Row="0" Value="fa-solid fa-folder-open"
-                                                     Margin="0,0,8,0"
-                                                     VerticalAlignment="Center" />
-                                        <TextBlock Grid.Column="1"
-                                                   VerticalAlignment="Center"
-                                                   Text="Select Directory"/>
-                                    </Grid>
-                                </Button>
-                            </ui:SettingsExpander.Footer>
-                        </ui:SettingsExpander>
-                    </Grid>
-                    
-                    <!-- Debug Options -->
-                    <Grid Grid.Row="5" RowDefinitions="auto,*" 
-                          Margin="0,8,0,0"
-                          IsVisible="{Binding SharedState.IsDebugMode}" >
-                        <TextBlock 
-                            FontWeight="Medium"
-                            Text="Debug Options" 
-                            Margin="0,0,0,8" />
-                            <ui:SettingsExpander
-                                Grid.Row="1"
-                                IconSource="Code"
-                                Command="{Binding LoadDebugInfo}"
-                                Header="Debug Options"
-                                Margin="8, 0,8,0">
-                                
-                                <ui:SettingsExpanderItem Description="Paths" IconSource="Folder"
-                                                         Margin="4, 0">
-                                    <SelectableTextBlock Text="{Binding DebugPaths}"
-                                                         Foreground="{DynamicResource TextControlPlaceholderForeground}"
-                                                         TextWrapping="WrapWithOverflow" />
-                                </ui:SettingsExpanderItem>
+<controls:UserControlBase
+    x:Class="StabilityMatrix.Avalonia.Views.SettingsPage"
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:avalonia="clr-namespace:Projektanker.Icons.Avalonia;assembly=Projektanker.Icons.Avalonia"
+    xmlns:controls="clr-namespace:StabilityMatrix.Avalonia.Controls"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:mocks="clr-namespace:StabilityMatrix.Avalonia.DesignData"
+    xmlns:ui="using:FluentAvalonia.UI.Controls"
+    xmlns:vm="clr-namespace:StabilityMatrix.Avalonia.ViewModels"
+    xmlns:lang="clr-namespace:StabilityMatrix.Avalonia.Languages"
+    d:DataContext="{x:Static mocks:DesignData.SettingsViewModel}"
+    d:DesignHeight="700"
+    d:DesignWidth="800"
+    x:CompileBindings="True"
+    x:DataType="vm:SettingsViewModel"
+    mc:Ignorable="d">
 
-                                <ui:SettingsExpanderItem Description="Compat Info" IconSource="StarFilled"
-                                                         Margin="4,0">
-                                    <SelectableTextBlock Text="{Binding DebugCompatInfo}"
-                                                         Foreground="{DynamicResource TextControlPlaceholderForeground}"
-                                                         TextWrapping="WrapWithOverflow" />
-                                </ui:SettingsExpanderItem>
-                                
-                                <ui:SettingsExpanderItem Description="GPU Info" IconSource="FullScreenMaximize"
-                                                         Margin="4,0">
-                                    <SelectableTextBlock Text="{Binding DebugGpuInfo}"
-                                                         Foreground="{DynamicResource TextControlPlaceholderForeground}"
-                                                         TextWrapping="WrapWithOverflow" />
-                                </ui:SettingsExpanderItem>
+    <ScrollViewer VerticalScrollBarVisibility="Auto">
+        <StackPanel Margin="8,16" Spacing="8">
+            <!--  Theme  -->
+            <Grid RowDefinitions="Auto,*,*">
+                <TextBlock
+                    Margin="0,0,0,8"
+                    FontWeight="Medium"
+                    Text="Appearance" />
+                <ui:SettingsExpander
+                    Grid.Row="1"
+                    Margin="8,0,8,4"
+                    Header="Theme"
+                    IconSource="WeatherMoon">
+                    <ui:SettingsExpander.Footer>
+                        <ComboBox
+                            MinWidth="100"
+                            ItemsSource="{Binding AvailableThemes}"
+                            SelectedItem="{Binding SelectedTheme}" />
+                    </ui:SettingsExpander.Footer>
+                </ui:SettingsExpander>
+                <ui:SettingsExpander
+                    Grid.Row="2"
+                    IsVisible="{Binding SharedState.IsDebugMode}"
+                    Margin="8,0,8,4"
+                    Header="{x:Static lang:Resources.Label_Language}"
+                    IconSource="Character">
+                    <ui:SettingsExpander.Footer>
+                        <ComboBox
+                            MinWidth="100"
+                            ItemsSource="{Binding AvailableLanguages}"
+                            DisplayMemberBinding="{Binding NativeName}"
+                            SelectedItem="{Binding SelectedLanguage}" />
+                    </ui:SettingsExpander.Footer>
+                </ui:SettingsExpander>
+            </Grid>
 
-                                <ui:SettingsExpanderItem Content="Animation Scale" IconSource="Clock"
-                                                         Description="Lower values = faster animations. 0x means animations are instant."
-                                                         Margin="4,0">
-                                    <ui:SettingsExpanderItem.Footer>
-                                        <ComboBox ItemsSource="{Binding AnimationScaleOptions}"
-                                                  SelectedItem="{Binding SelectedAnimationScale}">
-                                            <ComboBox.ItemTemplate>
-                                                <DataTemplate>
-                                                    <TextBlock>
-                                                        <Run Text="{Binding }"/><Run Text="x"/>
-                                                    </TextBlock>
-                                                </DataTemplate>
-                                            </ComboBox.ItemTemplate>
-                                        </ComboBox>
-                                    </ui:SettingsExpanderItem.Footer>
-                                </ui:SettingsExpanderItem>
-                                
-                                <ui:SettingsExpanderItem Content="Notification" IconSource="CommentAdd"
-                                                         Margin="4,0">
-                                    <ui:SettingsExpanderItem.Footer>
-                                        <Button
-                                            Command="{Binding DebugNotificationCommand}"
-                                            Content="New Notification"/>
-                                    </ui:SettingsExpanderItem.Footer>
-                                </ui:SettingsExpanderItem>
-                                
-                                <ui:SettingsExpanderItem Content="Content Dialog" IconSource="NewWindow"
-                                                         Margin="4,0">
-                                    <ui:SettingsExpanderItem.Footer>
-                                        <Button
-                                            Command="{Binding DebugContentDialogCommand}"
-                                            Content="Show Dialog"/>
-                                    </ui:SettingsExpanderItem.Footer>
-                                </ui:SettingsExpanderItem>
-                                
-                                <ui:SettingsExpanderItem Content="Exceptions" IconSource="Flag"
-                                                         Margin="4,0">
-                                    <ui:SettingsExpanderItem.Footer>
-                                        <Button
-                                            Command="{Binding DebugThrowExceptionCommand}"
-                                            Content="Unhandled Exception"/>
-                                    </ui:SettingsExpanderItem.Footer>
-                                </ui:SettingsExpanderItem>
-                                
-                                <ui:SettingsExpanderItem Content="Download Manager tests" IconSource="Flag"
-                                                         Margin="4,0,4,4">
-                                    <ui:SettingsExpanderItem.Footer>
-                                        <Button
-                                            Margin="0, 8"
-                                            Command="{Binding DebugTrackedDownloadCommand}"
-                                            Content="Add Tracked Download"/>
-                                    </ui:SettingsExpanderItem.Footer>
-                                </ui:SettingsExpanderItem>
-                                
-                            </ui:SettingsExpander>
-                    </Grid>
-                    
-                    <!-- TODO: Python card -->
-                    
-                    <!-- TODO: Debug card -->
-                    
-                    <!-- TODO: Directories card -->
-                    
-                    <Grid Grid.Row="6" RowDefinitions="auto,*" Margin="0,4,0,0">
-                        <StackPanel 
-                            Grid.Row="1" 
-                            HorizontalAlignment="Left" 
-                            Orientation="Vertical">
-                            <TextBlock
-                                FontSize="15"
-                                FontWeight="Bold"
-                                Margin="0,8"
-                                Text="About" />
-                            <Image
-                                Height="112"
-                                HorizontalAlignment="Left"
-                                Margin="8"
-                                Source="/Assets/Icon.png"
-                                Width="112" />
-                            <TextBlock
-                                FontWeight="Medium"
-                                Margin="8"
-                                Text="Stability Matrix" />
-                            <Panel>
-                                <Button
-                                    Name="VersionButton"
-                                    Command="{Binding OnVersionClick}"
-                                    Classes="transparent"
-                                    BorderThickness="0"
-                                    Content="{Binding AppVersion}"
-                                    Margin="8,0,8,8"
-                                    Padding="2,0,2,0"/>
-                                <ui:TeachingTip
-                                    PreferredPlacement="RightTop"
-                                    Target="{Binding #VersionButton}"
-                                    IsOpen="{Binding IsVersionTapTeachingTipOpen}"
-                                    Title="{Binding VersionFlyoutText}"/>
-                            </Panel>
-                            
-                            <StackPanel HorizontalAlignment="Left" Orientation="Horizontal">
-                                <Button
-                                    Content="License and Open Source Notices"
-                                    Command="{Binding ShowLicensesDialogCommand}"
-                                    HorizontalAlignment="Left"
-                                    Margin="8" />
-                            </StackPanel>
+            <!--  Checkpoints Manager Options  -->
+            <Grid RowDefinitions="auto,*,Auto">
+                <TextBlock
+                    Margin="0,0,0,8"
+                    FontWeight="Medium"
+                    Text="Checkpoint Manager" />
+                <ui:SettingsExpander
+                    Grid.Row="1"
+                    Margin="8,0"
+                    Description="Select this option if you're having problems moving Stability Matrix to another drive"
+                    Header="Remove shared checkpoints directory symbolic links on shutdown"
+                    IconSource="Folder">
+                    <ui:SettingsExpander.Footer>
+                        <CheckBox Margin="8" IsChecked="{Binding RemoveSymlinksOnShutdown}" />
+                    </ui:SettingsExpander.Footer>
+                </ui:SettingsExpander>
+                <ui:SettingsExpander
+                    Grid.Row="2"
+                    Margin="8,4"
+                    Description="Rebuilds the installed checkpoints cache. Use if checkpoints are incorrectly labeled in the Model Browser."
+                    Header="Reset Checkpoints Cache"
+                    IconSource="Refresh">
+                    <ui:SettingsExpander.Footer>
+                        <Button Command="{Binding ResetCheckpointCache}" Content="Reset Checkpoints Cache" />
+                    </ui:SettingsExpander.Footer>
+                </ui:SettingsExpander>
+            </Grid>
+
+            <!--  Environment Options  -->
+            <Grid RowDefinitions="Auto, Auto, Auto">
+                <TextBlock
+                    Margin="0,0,0,8"
+                    FontWeight="Medium"
+                    Text="Package Environment" />
+
+                <ui:SettingsExpander
+                    Grid.Row="1"
+                    Margin="8,0"
+                    Header="Environment Variables"
+                    IconSource="OtherUser">
+                    <ui:SettingsExpander.Footer>
+                        <Button Command="{Binding OpenEnvVarsDialogCommand}" Content="Edit" />
+                    </ui:SettingsExpander.Footer>
+                </ui:SettingsExpander>
+
+                <ui:SettingsExpander
+                    Grid.Row="2"
+                    Margin="8,4"
+                    Header="Embedded Python">
+                    <ui:SettingsExpander.IconSource>
+                        <controls:FASymbolIconSource Symbol="fa-brands fa-python" />
+                    </ui:SettingsExpander.IconSource>
+                    <ui:SettingsExpander.Footer>
+                        <StackPanel Orientation="Horizontal" Spacing="16">
+                            <controls:ProgressRing
+                                BorderThickness="3"
+                                IsEnabled="{Binding CheckPythonVersionCommand.IsRunning}"
+                                IsIndeterminate="True"
+                                IsVisible="{Binding CheckPythonVersionCommand.IsRunning}" />
+                            <Button Command="{Binding CheckPythonVersionCommand}" Content="Check Version" />
+                        </StackPanel>
+                    </ui:SettingsExpander.Footer>
+                </ui:SettingsExpander>
+            </Grid>
+
+            <!--  Integrations  -->
+            <Grid RowDefinitions="auto,*">
+                <TextBlock
+                    Margin="0,0,0,8"
+                    FontWeight="Medium"
+                    Text="Integrations" />
+                <ui:SettingsExpander
+                    Grid.Row="1"
+                    Margin="8,0,8,4"
+                    Header="Discord Rich Presence">
+                    <ui:SettingsExpander.IconSource>
+                        <controls:FASymbolIconSource Symbol="fa-brands fa-discord" />
+                    </ui:SettingsExpander.IconSource>
+                    <ui:SettingsExpander.Footer>
+                        <ToggleSwitch IsChecked="{Binding IsDiscordRichPresenceEnabled}" />
+                    </ui:SettingsExpander.Footer>
+                </ui:SettingsExpander>
+            </Grid>
+
+            <!--  System Options  -->
+            <Grid RowDefinitions="auto, auto, auto">
+                <TextBlock
+                    Margin="0,0,0,8"
+                    FontWeight="Medium"
+                    Text="System" />
+                <ui:SettingsExpander
+                    Grid.Row="1"
+                    Margin="8,0,8,4"
+                    Description="Uses the current app location, you can run this again if you move the app"
+                    Header="Add Stability Matrix to the Start Menu"
+                    IconSource="StarAdd"
+                    ToolTip.Tip="{OnPlatform Default='Only available on Windows',
+                                                 Windows={x:Null}}">
+                    <ui:SettingsExpander.Footer>
+                        <StackPanel Orientation="Horizontal" Spacing="8">
+                            <controls:ProgressRing
+                                BorderThickness="3"
+                                IsEnabled="{Binding IsVisible, RelativeSource={RelativeSource Self}}"
+                                IsIndeterminate="True">
+                                <controls:ProgressRing.IsVisible>
+                                    <MultiBinding Converter="{x:Static BoolConverters.Or}">
+                                        <Binding Path="AddToStartMenuCommand.IsRunning" />
+                                        <Binding Path="AddToGlobalStartMenuCommand.IsRunning" />
+                                    </MultiBinding>
+                                </controls:ProgressRing.IsVisible>
+                            </controls:ProgressRing>
+
+                            <SplitButton
+                                Command="{Binding AddToStartMenuCommand}"
+                                Content="Add for Current User"
+                                IsEnabled="{OnPlatform Default=False,
+                                                           Windows=True}">
+                                <SplitButton.Flyout>
+                                    <ui:FAMenuFlyout Placement="Bottom">
+                                        <ui:MenuFlyoutItem
+                                            Command="{Binding AddToGlobalStartMenuCommand}"
+                                            IconSource="Admin"
+                                            Text="Add for All Users" />
+                                    </ui:FAMenuFlyout>
+                                </SplitButton.Flyout>
+                            </SplitButton>
                         </StackPanel>
-                    </Grid>
-                    
-                    <!-- Extra space at the bottom -->
-                    <Panel Grid.Row="7" Margin="0,0,0,16" />
+                    </ui:SettingsExpander.Footer>
+                </ui:SettingsExpander>
+                <ui:SettingsExpander
+                    Grid.Row="2"
+                    Margin="8,0"
+                    Description="Does not move existing data"
+                    Header="Select New Data Directory"
+                    IconSource="MoveToFolder">
+                    <ui:SettingsExpander.Footer>
+                        <Button Command="{Binding PickNewDataDirectory}">
+                            <Grid ColumnDefinitions="Auto, Auto">
+                                <avalonia:Icon
+                                    Grid.Row="0"
+                                    Margin="0,0,8,0"
+                                    VerticalAlignment="Center"
+                                    Value="fa-solid fa-folder-open" />
+                                <TextBlock
+                                    Grid.Column="1"
+                                    VerticalAlignment="Center"
+                                    Text="Select Directory" />
+                            </Grid>
+                        </Button>
+                    </ui:SettingsExpander.Footer>
+                </ui:SettingsExpander>
             </Grid>
-        </ScrollViewer>
-    </Grid>
-    
-    
+
+            <!--  Debug Options  -->
+            <Grid
+                IsVisible="{Binding SharedState.IsDebugMode}"
+                RowDefinitions="auto,*">
+                <TextBlock
+                    Margin="0,0,0,8"
+                    FontWeight="Medium"
+                    Text="Debug Options" />
+                <ui:SettingsExpander
+                    Grid.Row="1"
+                    Margin="8,0,8,0"
+                    Command="{Binding LoadDebugInfo}"
+                    Header="Debug Options"
+                    IconSource="Code">
+
+                    <ui:SettingsExpanderItem
+                        Margin="4,0"
+                        Description="Paths"
+                        IconSource="Folder">
+                        <SelectableTextBlock
+                            Foreground="{DynamicResource TextControlPlaceholderForeground}"
+                            Text="{Binding DebugPaths}"
+                            TextWrapping="WrapWithOverflow" />
+                    </ui:SettingsExpanderItem>
+
+                    <ui:SettingsExpanderItem
+                        Margin="4,0"
+                        Description="Compat Info"
+                        IconSource="StarFilled">
+                        <SelectableTextBlock
+                            Foreground="{DynamicResource TextControlPlaceholderForeground}"
+                            Text="{Binding DebugCompatInfo}"
+                            TextWrapping="WrapWithOverflow" />
+                    </ui:SettingsExpanderItem>
+
+                    <ui:SettingsExpanderItem
+                        Margin="4,0"
+                        Description="GPU Info"
+                        IconSource="FullScreenMaximize">
+                        <SelectableTextBlock
+                            Foreground="{DynamicResource TextControlPlaceholderForeground}"
+                            Text="{Binding DebugGpuInfo}"
+                            TextWrapping="WrapWithOverflow" />
+                    </ui:SettingsExpanderItem>
+
+                    <ui:SettingsExpanderItem
+                        Margin="4,0"
+                        Content="Animation Scale"
+                        Description="Lower values = faster animations. 0x means animations are instant."
+                        IconSource="Clock">
+                        <ui:SettingsExpanderItem.Footer>
+                            <ComboBox ItemsSource="{Binding AnimationScaleOptions}" SelectedItem="{Binding SelectedAnimationScale}">
+                                <ComboBox.ItemTemplate>
+                                    <DataTemplate>
+                                        <TextBlock>
+                                            <Run Text="{Binding}" /><Run Text="x" />
+                                        </TextBlock>
+                                    </DataTemplate>
+                                </ComboBox.ItemTemplate>
+                            </ComboBox>
+                        </ui:SettingsExpanderItem.Footer>
+                    </ui:SettingsExpanderItem>
+
+                    <ui:SettingsExpanderItem
+                        Margin="4,0"
+                        Content="Notification"
+                        IconSource="CommentAdd">
+                        <ui:SettingsExpanderItem.Footer>
+                            <Button Command="{Binding DebugNotificationCommand}" Content="New Notification" />
+                        </ui:SettingsExpanderItem.Footer>
+                    </ui:SettingsExpanderItem>
+
+                    <ui:SettingsExpanderItem
+                        Margin="4,0"
+                        Content="Content Dialog"
+                        IconSource="NewWindow">
+                        <ui:SettingsExpanderItem.Footer>
+                            <Button Command="{Binding DebugContentDialogCommand}" Content="Show Dialog" />
+                        </ui:SettingsExpanderItem.Footer>
+                    </ui:SettingsExpanderItem>
+
+                    <ui:SettingsExpanderItem
+                        Margin="4,0"
+                        Content="Exceptions"
+                        IconSource="Flag">
+                        <ui:SettingsExpanderItem.Footer>
+                            <Button Command="{Binding DebugThrowExceptionCommand}" Content="Unhandled Exception" />
+                        </ui:SettingsExpanderItem.Footer>
+                    </ui:SettingsExpanderItem>
+
+                    <ui:SettingsExpanderItem
+                        Margin="4,0,4,4"
+                        Content="Download Manager tests"
+                        IconSource="Flag">
+                        <ui:SettingsExpanderItem.Footer>
+                            <Button
+                                Margin="0,8"
+                                Command="{Binding DebugTrackedDownloadCommand}"
+                                Content="Add Tracked Download" />
+                        </ui:SettingsExpanderItem.Footer>
+                    </ui:SettingsExpanderItem>
+
+                </ui:SettingsExpander>
+            </Grid>
+
+            <!--  TODO: Directories card  -->
+
+            <Grid RowDefinitions="auto,*">
+                <StackPanel
+                    Grid.Row="1"
+                    HorizontalAlignment="Left"
+                    Orientation="Vertical">
+                    <TextBlock
+                        Margin="0,8"
+                        FontSize="15"
+                        FontWeight="Bold"
+                        Text="About" />
+                    <Image
+                        Width="112"
+                        Height="112"
+                        Margin="8"
+                        HorizontalAlignment="Left"
+                        Source="/Assets/Icon.png" />
+                    <TextBlock
+                        Margin="8"
+                        FontWeight="Medium"
+                        Text="Stability Matrix" />
+                    <Panel>
+                        <Button
+                            Name="VersionButton"
+                            Margin="8,0,8,8"
+                            Padding="2,0,2,0"
+                            BorderThickness="0"
+                            Classes="transparent"
+                            Command="{Binding OnVersionClick}"
+                            Content="{Binding AppVersion}" />
+                        <ui:TeachingTip
+                            Title="{Binding VersionFlyoutText}"
+                            IsOpen="{Binding IsVersionTapTeachingTipOpen}"
+                            PreferredPlacement="RightTop"
+                            Target="{Binding #VersionButton}" />
+                    </Panel>
+
+                    <StackPanel HorizontalAlignment="Left" Orientation="Horizontal">
+                        <Button
+                            Margin="8"
+                            HorizontalAlignment="Left"
+                            Command="{Binding ShowLicensesDialogCommand}"
+                            Content="License and Open Source Notices" />
+                    </StackPanel>
+                </StackPanel>
+            </Grid>
+
+            <!--  Extra space at the bottom  -->
+            <Panel Margin="0,0,0,16" />
+        </StackPanel>
+    </ScrollViewer>
+
+
 </controls:UserControlBase>

StabilityMatrix.Core/Models/Settings/Settings.cs

@@ -7,7 +7,8 @@ public class Settings
     public int? Version { get; set; } = 1;
     public bool FirstLaunchSetupComplete { get; set; }
     public string? Theme { get; set; } = "Dark";
-
+    public string? Language { get; set; } = "en-US";
+    
     public List<InstalledPackage> InstalledPackages { get; set; } = new();
     
     [JsonPropertyName("ActiveInstalledPackage")]