I dated a girl that was going to school to be a veterinarian. She would say "costiz" for the word cost.. Bugged the shit out of me. I always thought she was way too dumb to make it in life.. She did have nice tits though.
I hope you were kind enough to help her with her grammar. Just keep correcting, until she learns how to speak. Technically, you'd be helping her.
This waitress I encountered recently sat me and my girl down and said, "How's yous doing?"
I replied, "We's doin good." She looked at me and smirked in a disgusting way...
I thought, this meal hasn't even started and I'm already giving you a big tip.
The best thing about having good grammar, is being able to help others in need. It's also a great way to make friends.