On http://msdn.microsoft.com/de-de/library/windows/apps/jj569303.aspx reference is made to enable Multilanguage Support by clicking the menu "Extra" in Visual Studio. There is no menu "Extra". The menu name is "Tools". You may change to the correct name as I was (and maybe other are or will) hunting for that option for some time... I did thought already maybe my Visual Studio Express 2012 is suffering because its in German.