There is nothing worng with know several languages but to only know one language where the common language is not that language is wrong. If you want to come to this country and take part in everything we have to offer then you should learn the common language. It should not be up the those of us who are born here to learn the language of other countries to make it easier for them to to get by here. I own a booth at the local fleamarket and we get many Mexicans in to shop. If they don't speak english or have an interpretator with them they won't get anything from me. It is not my responsibility to learn their language, it is their responsibility to learn mine.