I could add it for the menus, but ultimately there is no card art in Arabic, so it's impossible to play Magic if you don't know English—though I can add it without any problem.
There's actually one card with Arabic text. But also, are you not just getting the card text from Scryfall or Gatherer or something? You can just run that through a translation app.
You're right, and I'm working on it; tomorrow's update will include Arabic support. Do you know if itch.io is widely used by that audience? What would be a good way to reach them? Reddit?