I would say it is even more diverse than spanish to portuguese, but she was able to follow most of the conversations and stuff, but her parents couldn't really, my wife also speaks Polish and Russian fluently so it helps her. I remember here in Atl when we were leaving or coming back she was able to help some lost old woman from one of the forum republic countries I forgot which, maybe Latvia, but they could understand each other enough to find where she needed to go. the airport personell were not so helpful in that situation.