Language can now be switched without requiring a game restart

README.md

@@ -7,6 +7,7 @@ User manual: http://www.viathinksoft.de/tmpe
 1.9.5, 05/24/2017
 - Updated for game version 1.7.1-f1
 - Updated Polish, Korean and Italian translation
+- Language can now be switched without requiring a game restart
 - Bugfix: Routing calculation does not work as expected for one-way roads with tram tracks (thanks to @bigblade66, @Battelman2 and @AS_ for reporting and providing extensive information)
 - Bugfix: Copying timed traffic lights lead to inconsistent internal states which causes timed traffic lights to be omitted during the save process (thanks to @jakeroot and @t1a2l for reporting this issue)
 - Bugfix: In certain situations unnecessary vehicle-seperate traffic lights are being created

TLM/TLM/State/Options.cs

@@ -12,6 +12,7 @@
 using ColossalFramework.Globalization;
 using TrafficManager.Manager;
 using CSUtil.Commons;
+using System.Reflection;
 
 namespace TrafficManager.State {
 
@@ -183,7 +184,7 @@ public static void makeSettings(UIHelperBase helper) {
 				}
 			}
 
-			languageDropdown = generalGroup.AddDropdown(Translation.GetString("Language") + " (" + Translation.GetString("requires_game_restart") + "):", languageLabels, languageIndex, onLanguageChanged) as UIDropDown;
+			languageDropdown = generalGroup.AddDropdown(Translation.GetString("Language") + ":", languageLabels, languageIndex, onLanguageChanged) as UIDropDown;
 			lockButtonToggle = generalGroup.AddCheckbox(Translation.GetString("Lock_main_menu_button_position"), GlobalConfig.Instance.MainMenuButtonPosLocked, onLockButtonChanged) as UICheckBox;
 			lockMenuToggle = generalGroup.AddCheckbox(Translation.GetString("Lock_main_menu_position"), GlobalConfig.Instance.MainMenuPosLocked, onLockMenuChanged) as UICheckBox;
 
@@ -444,17 +445,28 @@ private static void onConnectedLanesOverlayChanged(bool newValue) {
 		}
 
 		private static void onLanguageChanged(int newLanguageIndex) {
+			bool localeChanged = false;
+
 			if (newLanguageIndex <= 0) {
 				GlobalConfig.Instance.LanguageCode = null;
 				GlobalConfig.WriteConfig();
 				MenuRebuildRequired = true;
+				localeChanged = true;
 			} else if (newLanguageIndex - 1 < Translation.AVAILABLE_LANGUAGE_CODES.Count) {
 				GlobalConfig.Instance.LanguageCode = Translation.AVAILABLE_LANGUAGE_CODES[newLanguageIndex - 1];
 				GlobalConfig.WriteConfig();
 				MenuRebuildRequired = true;
+				localeChanged = true;
 			} else {
 				Log.Warning($"Options.onLanguageChanged: Invalid language index: {newLanguageIndex}");
 			}
+
+			if (localeChanged) {
+				MethodInfo onChangedHandler = typeof(OptionsMainPanel).GetMethod("OnLocaleChanged", BindingFlags.Instance | BindingFlags.NonPublic);
+				if (onChangedHandler != null) {
+					onChangedHandler.Invoke(UIView.library.Get<OptionsMainPanel>("OptionsPanel"), new object[0] { });
+				}
+			}
 		}
 
 		private static void onLockButtonChanged(bool newValue) {