>>338991Is Amestrian, if I recall, same as Ed and Al. They speak Japanese because that's the language the intended audience speaks, same reason as Russian submariners speak English among themselves when in a Hollywood movie.
You're right, she wouldn't technically be Aryan, since fantasy worlds with different histories and laws of physics. Before anyone argues the one movie, where Amestris is a dimensional barrier away from Germany, nothing except Brotherhood is canon. But even so, their leader is called Fuhrer, so pretty damn close.