locale changed in various applications menu
 

I recently moved from gnome to xfce in my arch linux box. After I added greek to keyboard layout some applications like skype, openoffice and vlc changed their menus in greek characters. English language but greek characters! Anyone got any idea what can I do with this one?
screenshot

What is the output when you run 'locale' ?
Do you have any specific config file in which you set a language?