Sounds pretty normal for an uncouth, rough around the edges 9yo with no manners. I wouldn't let my offspring associate with her for a while after that. Not forever, they have amazing forgiveness capacity at that age.

My 9yo manages to be rude and offensive without swearing (she doesn't swear), just because she is low on empathy and has no tact at all, and you have to give her a pretty serious talk to get it through to her that, well, your best friend is crying because of something YOU said that wasn't nice, generally with a protracted argument as to why it wasn't nice.

Ah, tweenagers. I hear they get worse as they get older too *grin*