On the download site I posted add-on packs for French language support and the first steps toward Arabic language support, which are the string tables. My friend Malek Kemmou from Morocco wants to help me figuring out how we can make right-to-left reading work "magically" and without having to rework all the templates. He also did those two translations. Thanks!

Update: I added a first attempt at generic RTL support to my private build and installed it here. If the primary language is set to any of the Arabic language variants, the page will flip into RTL reading. There are some issues around formatting to be worked out, though.