I'm using a translation plugin (along with twenty-ten theme), but the problem seems to be that WordPress is not identifying Arabic as an RTL language. It's wrongly displaying as LTR - thus not reading my RTL.css doc.
<html xmlns="http://www.w3.org/1999/xhtml" dir="ltr" lang="ar">
Any ideas? Is there a way to force/reset WordPress' interpretaion of Arabic as an RTL language so that it will see my RTL stylesheet?