One does not have to say "So help me God," or mention God at all when swearing on oath.
Jawaab: Midda Diin ka baxa ah, ma aha addeecid oo dhan, ee waa: "wax uu Allaah jideeyey, faray ama reebay, oo aad ku addeecaysid markii laguu jideeyo khilaafki."