Question [Q] Language support on Galaxy Tab 3 10.1 (USA)

Hi, my grandfather bought an Galaxy Tab 3 10.1 from United states, and he wants farsi support on it, I've been searching and found out that on united state devices more locals cannot bring farsi support back, so I'm in need of a rom with farsi support (official 4.2.2. would be great)

help me out please

Please note that I don't want a farsi capable keyboard. thanks.