So, kind of going back on topic here, I have a friend that is originally from Bulgaria. She doesn't know that I am learning Russian, but I really could benefit from working with someone that knows the language. If I remember right, I think she speaks Russian too, but am not absolutely certain.

I would like to learn from her (Bulgarian too, after my Russian skills have gotten up to par), but do not want to unintentionally insult her. It seems that I read somewhere that some people do get insulted over the subject (though I don't know why exactly). Is this the case? If so, how should I ask in order to not be offensive?