I still don’t know what is stopping you. Assume you have a sentence “A B C D E F” (no matter the language), you can given the model either “A B C D E F” or “F E D C B A”. Or you have two networks, one for each order. Or one bidirectional network.
I’m not saying that the task of GEC is trivial. I’m just saying there’s no difference between English and Arabic due to the reading direction.