If you already own the game, the Arabic commentary might already be on your disc or in your game files. For Console (PS3/Xbox 360):
Since official support has ended, many fans rely on manual patches to add the Essam El Shawaly commentary back into the game. The Files You Need: fifa 12 arabic commentary download
In older versions of Origin, you could sometimes change the "Game Language" in the settings, which would trigger a download of the language pack. How to check: Go to the game's Properties in the EA App or Steam, look for If you already own the game, the Arabic