Her old friends reject her and find her snobbish. Using what you know about language deviation, why do you think this occurred?

Because when you learn a different language you are also taught about your own language. You may not know what adverbs are until you learn another language because we use slang in our native language. So when we learn how to speak our language properly we sound more educated. They thought that she was acting as if she was better than them, in an grammar aspect.