Every now and again we have at translatewiki.net a request that is a bit out of the ordinary. The request that OsamaK made today is one such; he asked for the support of gender to be enabled for the Arabic language.
Gender support was originally implemented for the Slavic languages and now this mechanism is requested for Arabic as well. MediaWiki is almost fully localised for the Arabic language and, I imagine that it will be a lot of work to implement gender fully.
Supporting this request is something that is ours to do in translatewiki.net, other aspects of support for right to left languages like having a proper layout for the preferences in Commons is for the Wikimedia Foundation's developers...