I can speak a little afrikaans, and a little french. Used to be fluent in Italian. It was my major in high school, and I'm fluent in massaij (african language spoken throughout several regions that my extended family have lived in).
I think in english mainly but when I'm talking with family who only speak massaij I do tend to think that way. Often family conversations are split, jumping back and forward between eng and mas and then I pretty much always think in eng.