I wandered when i see an Arabic language in IMDb
Hello! From a perspective of westerner who tried to learn Arabic language, I should say that such expansion is quite possible, but will be extremely hard for IMDb staff as it will require translating at least a few thousand common phrases and terms used, which should be done professionally in order not to have gibberish on pages. Also names should be translated professionally to avoid gibberish as well. Developing a version of IMDb in Arabic which will be as of great quality will took years to develop and there's no guarantee so far that this much Arabic people would love the experience.
As IMDb isn't available in any other languages than English, you're unlikely to see an Arabic language IMDb anytime soon. You can get Arabic movie titles, for titles which have had the Arabic title contributed, by choosing Arabic as the Title Display Country and Title Display Language in the Site General Settings, if it's of any help to you.