If it is just for e-commerce, just steal signup form from local e-commerce websites. Or if there are local competitor platforms that does as good as yours, look

If it is just for e-commerce, just steal signup form from local e-commerce websites. Or if there are local competitor platforms that does as good as yours, look into theirs. But the question sounds like there are already substantial asian users in divergent conventions without frictions. If that is what your app is trying to fix, I'm not completely sure how it will work out.