[General]Support language selection (#34971)

* Language setting

* spellcheck

* Set FileLocksmithContextMenu package version in AppManifest.xml

* Fix ambigious symbol build error

* Fix ambigious symbol build error #2

* Revert unneeded changes

* Improve perf

* try fix ci build

src/settings-ui/Settings.UI.Library/LanguageModel.cs

@@ -0,0 +1,49 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.IO;
+using System.IO.Abstractions;
+using System.Text.Json;
+
+namespace Microsoft.PowerToys.Settings.UI.Library
+{
+    public class LanguageModel
+    {
+        public const string SettingsFilePath = "\\Microsoft\\PowerToys\\";
+        public const string SettingsFile = "language.json";
+
+        public string Tag { get; set; }
+
+        public string ResourceID { get; set; }
+
+        public string Language { get; set; }
+
+        public static string LoadSetting()
+        {
+            FileSystem fileSystem = new FileSystem();
+            var localAppDataDir = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
+            var file = localAppDataDir + SettingsFilePath + SettingsFile;
+
+            if (fileSystem.File.Exists(file))
+            {
+                try
+                {
+                    Stream inputStream = fileSystem.File.Open(file, FileMode.Open);
+                    StreamReader reader = new StreamReader(inputStream);
+                    string data = reader.ReadToEnd();
+                    inputStream.Close();
+                    reader.Dispose();
+
+                    return JsonSerializer.Deserialize<OutGoingLanguageSettings>(data).LanguageTag;
+                }
+                catch (Exception)
+                {
+                }
+            }
+
+            return string.Empty;
+        }
+    }
+}