I love foreign languages, but I can' t really say the scientific/ linguistic approach is something I enjoy. I would rather learn other languages by myself, if possible, or by spending time with native speakers.
English is not my native language, so I can count two, so far. I am currently learning the third one, too.
I also know a fourth language, at an A2 level, maybe, or between A2-B1. I'm still working on it.