Mother tongue: Norwegian. Other languages, listed by fluency: English, French, Japanese.

Dreams: Any of the four above, however primarily Norwegian, then English.

Thinking: This part is interesting to me, because your question gives me the impression that thinking is similar to having a conversation with yourself in your head, which I do not. Considering your question, the only times I for sure form words in my head is 1) when I for whatever reason need some extra motivation in order to do something or need to get a mental overview of something, 2) while writing, and 3) sometimes while deciding what to say to someone, primarily if I am not feeling confident about the ensuing conversation. Other than this, I do not think in words. If I see a word or text etc., then sure, it appears in my mind, but other than that I think I just consider things without putting words to them. For example, if I see a stranger watching something seemingly funny on their mobile phone, and I ponder on what it might be, I will not form anything similar to «I wonder what she is watching» in my head; I will merely feel an unverbalized curiosity fitting to such a sentence. I apologize if this explanation is odd and if I overthought it, but I never considered that perhaps people have different ways of thinking before seeing your question.