I am a linguist

A linguist in the academic sense is a person who studies natural language (an academic discipline known as linguistics). Ambiguously, the word is sometimes also used to refer to a polyglot (one who knows several languages), or a grammarian (a scholar of grammar), but these two uses of the word are distinct (and one does not have to be a polyglot in order to be an academic linguist).

I speak Swedish, Polish, German and English.