diff --git a/examples/example1/res/i18n/en.ini b/examples/example1/res/i18n/en.ini
index 94260b4c..f0415321 100644
--- a/examples/example1/res/i18n/en.ini
+++ b/examples/example1/res/i18n/en.ini
@@ -1,4 +1,4 @@
-EXIT=Exit
+EXIT=Exit
 MENU_FILE=&File
 MENU_FILE_OPEN=&Open
 MENU_FILE_OPEN_RECENT=Open recent
@@ -14,7 +14,7 @@ MENU_EDIT_PREFERENCES=&Preferences
 MENU_VIEW=&View
 MENU_VIEW_LANGUAGE=Interface &Language
 MENU_VIEW_LANGUAGE_EN=English
-MENU_VIEW_LANGUAGE_RU=Russian
+MENU_VIEW_LANGUAGE_RU=Русский
 MENU_VIEW_THEME=&Theme
 MENU_VIEW_THEME_DEFAULT=&Default
 MENU_VIEW_THEME_CUSTOM1=&Custom 1
@@ -24,3 +24,9 @@ MENU_HELP=&Help
 MENU_HELP_VIEW_HELP=&View help
 MENU_HELP_ABOUT=&About
 
+TAB_LONG_LIST=Long list
+TAB_BUTTONS=Buttons
+TAB_ANIMATION=Animation
+TAB_TABLE_LAYOUT=Table layout
+TAB_EDITORS=Editors
+
diff --git a/examples/example1/res/i18n/ru.ini b/examples/example1/res/i18n/ru.ini
index fc1e0776..82f24a22 100644
--- a/examples/example1/res/i18n/ru.ini
+++ b/examples/example1/res/i18n/ru.ini
@@ -1 +1,33 @@
-EXIT=Выход
+EXIT=Выход
+MENU_FILE=&Файл
+MENU_FILE_OPEN=&Открыть
+MENU_FILE_OPEN_RECENT=Открыть из последних
+MENU_FILE_SAVE=&Сохранить
+MENU_FILE_EXIT=Вы&ход
+MENU_EDIT=&Правка
+MENU_EDIT_COPY=&Копировать
+MENU_EDIT_PASTE=&Вставить
+MENU_EDIT_CUT=Вырезать
+MENU_EDIT_UNDO=&Отмена
+MENU_EDIT_REDO=&Повторить
+MENU_EDIT_PREFERENCES=&Настройки
+MENU_VIEW=&Вид
+MENU_VIEW_LANGUAGE=&Язык интерфейса
+MENU_VIEW_LANGUAGE_EN=English
+MENU_VIEW_LANGUAGE_RU=Русский
+MENU_VIEW_THEME=&Тема
+MENU_VIEW_THEME_DEFAULT=Стандартная
+MENU_VIEW_THEME_CUSTOM1=Пример 1
+MENU_WINDOW=&Окно
+MENU_WINDOW_PREFERENCES=&Настройки
+MENU_HELP=&Справка
+MENU_HELP_VIEW_HELP=&Просмотр справки
+MENU_HELP_ABOUT=&О программе
+
+TAB_LONG_LIST=Длинный список
+TAB_BUTTONS=Кнопки
+TAB_ANIMATION=Анимация
+TAB_TABLE_LAYOUT=Табличный layout
+TAB_EDITORS=Редакторы
+
+
diff --git a/examples/example1/src/main.d b/examples/example1/src/main.d
index d49d8e71..bddde90d 100644
--- a/examples/example1/src/main.d
+++ b/examples/example1/src/main.d
@@ -131,17 +131,35 @@ extern (C) int UIAppMain(string[] args) {
 
 		MenuItem viewItem = new MenuItem(new Action(60, "MENU_VIEW"));
 		MenuItem langItem = new MenuItem(new Action(61, "MENU_VIEW_LANGUAGE"));
-		langItem.add((new MenuItem(new Action(611, "MENU_VIEW_LANGUAGE_EN"))).type(MenuItemType.Radio).checked(true));
-		langItem.add((new MenuItem(new Action(612, "MENU_VIEW_LANGUAGE_RU"))).type(MenuItemType.Radio));
+		auto onLangChange = delegate (MenuItem item) {
+			if (!item.checked)
+				return false;
+			if (item.id == 611) {
+				// set interface language to english
+				i18n.load("en.ini");
+				contentLayout.requestLayout();
+			} else if (item.id == 612) {
+				// set interface language to russian
+				i18n.load("ru.ini", "en.ini");
+				contentLayout.requestLayout();
+			}
+			return true;
+		};
+		MenuItem enLang = (new MenuItem(new Action(611, "MENU_VIEW_LANGUAGE_EN"))).type(MenuItemType.Radio).checked(true);
+		MenuItem ruLang = (new MenuItem(new Action(612, "MENU_VIEW_LANGUAGE_RU"))).type(MenuItemType.Radio);
+		enLang.onMenuItemClick = onLangChange;
+		ruLang.onMenuItemClick = onLangChange;
+		langItem.add(enLang);
+		langItem.add(ruLang);
 		MenuItem themeItem = new MenuItem(new Action(62, "MENU_VIEW_THEME"));
 		themeItem.add((new MenuItem(new Action(621, "MENU_VIEW_THEME_DEFAULT"))).type(MenuItemType.Radio).checked(true));
 		themeItem.add((new MenuItem(new Action(622, "MENU_VIEW_THEME_CUSTOM1"))).type(MenuItemType.Radio));
 		viewItem.add(langItem);
 		viewItem.add(themeItem);
 
-		MenuItem windowItem = new MenuItem(new Action(3, "MENU_WINDOW"));
+		MenuItem windowItem = new MenuItem(new Action(3, "MENU_WINDOW"c));
         windowItem.add(new Action(30, "MENU_WINDOW_PREFERENCES"));
-        MenuItem helpItem = new MenuItem(new Action(4, "MENU_HELP"));
+        MenuItem helpItem = new MenuItem(new Action(4, "MENU_HELP"c));
         helpItem.add(new Action(40, "MENU_HELP_VIEW_HELP"));
         helpItem.add(new Action(41, "MENU_HELP_ABOUT"));
         mainMenuItems.add(fileItem);
@@ -239,7 +257,7 @@ extern (C) int UIAppMain(string[] args) {
             assert(list.itemEnabled(6) == true);
             list.layoutWidth(FILL_PARENT).layoutHeight(FILL_PARENT);
             list.selectItem(0);
-            tabs.addTab(list, "Long List"d);
+            tabs.addTab(list, "TAB_LONG_LIST"c);
         }
 
         {
@@ -329,7 +347,7 @@ extern (C) int UIAppMain(string[] args) {
 
             layout3.addChild(new VSpacer());
             layout3.layoutWidth(FILL_PARENT).layoutHeight(FILL_PARENT);
-            tabs.addTab(layout3, "Buttons"d);
+            tabs.addTab(layout3, "TAB_BUTTONS"c);
         }
 
 		TableLayout table = new TableLayout("TABLE");
@@ -347,11 +365,11 @@ extern (C) int UIAppMain(string[] args) {
 		table.addChild((new TextWidget(null, "Param 3"d)).alignment(Align.Right | Align.VCenter));
 		table.addChild((new EditLine("edit3", "Parameter 3 value"d)).layoutWidth(FILL_PARENT));
 		table.margins(Rect(10,10,10,10)).layoutWidth(FILL_PARENT);
-		tabs.addTab(table, "Table Layout"d);
+		tabs.addTab(table, "TAB_TABLE_LAYOUT"c);
 
         tabs.addTab((new TextWidget()).id("tab5").textColor(0x00802000).text("Tab 5 contents"), "Tab 5"d);
 
-		tabs.addTab((new SampleAnimationWidget("tab6")).layoutWidth(FILL_PARENT).layoutHeight(FILL_PARENT), "Animation"d);
+		tabs.addTab((new SampleAnimationWidget("tab6")).layoutWidth(FILL_PARENT).layoutHeight(FILL_PARENT), "TAB_ANIMATION"c);
 
         //==========================================================================
 		// create Editors test tab
@@ -390,7 +408,7 @@ extern (C) int UIAppMain(string[] args) {
 		editors.addChild(editBox2);
         editors.layoutHeight(FILL_PARENT).layoutWidth(FILL_PARENT);
 
-        tabs.addTab(editors, "Editors"d);
+        tabs.addTab(editors, "TAB_EDITORS"c);
 
         //==========================================================================
 
diff --git a/src/dlangui/widgets/controls.d b/src/dlangui/widgets/controls.d
index 45aeb0b8..ac3199bb 100644
--- a/src/dlangui/widgets/controls.d
+++ b/src/dlangui/widgets/controls.d
@@ -74,8 +74,8 @@ class TextWidget : Widget {
 		return this;
     }
     /// set text to show
-    override @property Widget text(ref UIString s) { 
-        _text = s; 
+    override @property Widget text(UIString s) { 
+        _text = s;
         requestLayout();
 		return this;
     }
@@ -199,7 +199,7 @@ class ImageTextButton : HorizontalLayout {
     protected TextWidget _label;
     override @property dstring text() { return _label.text; }
     override @property Widget text(dstring s) { _label.text = s; requestLayout(); return this; }
-    override @property Widget text(ref UIString s) { _label.text = s; requestLayout(); return this; }
+    override @property Widget text(UIString s) { _label.text = s; requestLayout(); return this; }
     this(string ID = null, string drawableId = null, string textResourceId = null) {
         super(ID);
         styleId = "BUTTON";
@@ -292,7 +292,7 @@ class Button : Widget {
     protected UIString _text;
     override @property dstring text() { return _text; }
     override @property Widget text(dstring s) { _text = s; requestLayout(); return this; }
-    override @property Widget text(ref UIString s) { _text = s; requestLayout(); return this; }
+    override @property Widget text(UIString s) { _text = s; requestLayout(); return this; }
     @property Widget textResource(string s) { _text = s; requestLayout(); return this; }
     this(string ID = null) {
 		super(ID);
diff --git a/src/dlangui/widgets/editors.d b/src/dlangui/widgets/editors.d
index 0ece7329..5578f480 100644
--- a/src/dlangui/widgets/editors.d
+++ b/src/dlangui/widgets/editors.d
@@ -1101,7 +1101,7 @@ class EditWidgetBase : WidgetGroup, EditableContentListener, MenuItemActionHandl
     }
 
     /// set text
-    override @property Widget text(ref UIString s) { 
+    override @property Widget text(UIString s) { 
         _content.text = s;
         requestLayout();
 		return this;
diff --git a/src/dlangui/widgets/menu.d b/src/dlangui/widgets/menu.d
index 82cf482c..cfc8d334 100644
--- a/src/dlangui/widgets/menu.d
+++ b/src/dlangui/widgets/menu.d
@@ -42,6 +42,17 @@ enum MenuItemType {
 	Submenu
 }
 
+/// interface to handle menu item click
+interface MenuItemClickHandler {
+	bool onMenuItemClick(MenuItem item);
+}
+
+/// interface to handle menu item action
+interface MenuItemActionHandler {
+	bool onMenuItemAction(const Action action);
+}
+
+
 /// menu item properties
 class MenuItem {
     protected bool _checked;
@@ -50,7 +61,11 @@ class MenuItem {
     protected Action _action;
     protected MenuItem[] _subitems;
 	protected MenuItem _parent;
-    /// item action id, 0 if no action
+	/// handle menu item click (parameter is MenuItem)
+	Signal!MenuItemClickHandler onMenuItemClick;
+	/// handle menu item click action (parameter is Action)
+	Signal!MenuItemActionHandler onMenuItemAction;
+	/// item action id, 0 if no action
     @property int id() { return _action is null ? 0 : _action.id; }
     /// returns count of submenu items
     @property int subitemCount() {
@@ -345,14 +360,6 @@ class MenuItemWidget : WidgetGroup {
     }
 }
 
-interface MenuItemClickHandler {
-	bool onMenuItemClick(MenuItem item);
-}
-
-interface MenuItemActionHandler {
-	bool onMenuItemAction(const Action action);
-}
-
 /// base class for menus
 class MenuWidgetBase : ListWidget {
 	protected MenuWidgetBase _parentMenu;
@@ -496,6 +503,10 @@ class MenuWidgetBase : ListWidget {
 		} else if (item.type == MenuItemType.Radio) {
 			item.checked = true;
 		}
+		if (item.onMenuItemClick.assigned)
+			item.onMenuItemClick(item);
+		if (item.onMenuItemAction.assigned && item.action)
+			item.onMenuItemAction(item.action);
 	}
 
 	protected void onMenuItem(MenuItem item) {
diff --git a/src/dlangui/widgets/widget.d b/src/dlangui/widgets/widget.d
index c2058039..abc2d789 100644
--- a/src/dlangui/widgets/widget.d
+++ b/src/dlangui/widgets/widget.d
@@ -440,7 +440,7 @@ class Widget {
     /// sets widget content text (override to support this)
     @property Widget text(dstring s) { return this; }
     /// sets widget content text (override to support this)
-    @property Widget text(ref UIString s) { return this; }
+    @property Widget text(UIString s) { return this; }
 
     //==================================================================
     // Layout and drawing related methods