body { direction : rtl; }
you have to learn html and css lang because you have to edit all the templates
btw
visit the arabic support for XOOPS v 1.3.8 hacked version with all modules , hacks and themesclick here
sorry i dont support XOOPS v 2 until they release v 3 of XOOPS but i can help you in my site
dont forget XOOPS is the best portal in the world so you have to use it now
i am working now to upgrade my XOOPS to the good new release so i am very sorry if i late