Theme change based on language

Hi all
I’m currently Using WordPress 3.0.1 with qtranslate to run a Bilingual Arabic /English site … everything is working cool ,but i need a way to use a different theme for each language so when a user switches to Arabic the theme changes to the Arabic one ..
I have searched for a while and found a plugin called theme switcher that provides a widget for theme changing ,but couldn’t combine the 2 actions together.