[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/OutGoingLanguageSettings.cs

@@ -0,0 +1,29 @@
+// 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.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace Microsoft.PowerToys.Settings.UI.Library
+{
+    public class OutGoingLanguageSettings
+    {
+        [JsonPropertyName("language")]
+        public string LanguageTag { get; set; }
+
+        public OutGoingLanguageSettings()
+        {
+        }
+
+        public OutGoingLanguageSettings(string language)
+        {
+            LanguageTag = language;
+        }
+
+        public override string ToString()
+        {
+            return JsonSerializer.Serialize(this);
+        }
+    }
+}