feature<*>: add translation for Simplified Chinese

src/App.xaml.cs

@@ -30,6 +30,25 @@ namespace SourceGit {
             }
         }
 
+        /// <summary>
+        ///     Load text from locales.
+        /// </summary>
+        /// <param name="key"></param>
+        /// <returns></returns>
+        public static string Text(string key) {
+            return Current.FindResource("Text." + key) as string;
+        }
+
+        /// <summary>
+        ///     Format text
+        /// </summary>
+        /// <param name="key"></param>
+        /// <param name="args"></param>
+        /// <returns></returns>
+        public static string Format(string key, params object[] args) {
+            return string.Format(Text(key), args);
+        }
+
         /// <summary>
         ///     Raise error message.
         /// </summary>
@@ -109,6 +128,16 @@ namespace SourceGit {
                 }
             }
 
+            // Apply locales
+            if (Setting.UI.Locale != "en_US") {
+                foreach (var rs in Current.Resources.MergedDictionaries) {
+                    if (rs.Source != null && rs.Source.OriginalString.StartsWith("pack://application:,,,/Resources/Locales/")) {
+                        rs.Source = new Uri($"pack://application:,,,/Resources/Locales/{Setting.UI.Locale}.xaml", UriKind.Absolute);
+                        break;
+                    }
+                }
+            }
+
             // Show main window
             MainWindow = new UI.Launcher();
             MainWindow.Show();