Many third culture kids become multi-lingual along the way, whether it is because their parents are from different cultures or they go to school in the home language of the country they are in or because they need to be to live and fit in in their adopted country.
DD8 has amazing linguistic skills because of her early exposure to languages. She can not only pick up vocabulary very quickly, but her accents tend to be spot on if she is learning from a native speaker.
I think it takes a lot of talking through feelings and expecting frustrations and feelings of loneliness from everyone in the family. Recognizing that it is probably culture shock that is causing some stress a couple of months into the move is really helpful. (It takes a couple of months before the newness of the situation wears off and you start really noticing the differences between your new home and your old one.)
