I fluently speak Dutch (mother tongue), French (language we frequently use due to us living in the neighbourhood of Brussels, and half our country speaks it ^^ And I've got family who speak it), and English. I can understand German, but speaking it can prove to be difficult sometimes, it's been several years since I learned it for two years. And well, it's not fluently, but if I really really want and put in a lot of effort, I'd be able to understand written Spanish or Italian too, since I took Latin lessons too. It's pretty fun to decode it, haha. And while I'm listing every single language I know, I guess I can add Greek too, but I can only read it, not understand it. It's been way too long. I only know kali mera, kali spera and kali nichta (respectively "good day/good morning", "good noon" and "good night").
By the way, do notice that the way Belgians talk in Dutch and the people from the Netherlands do is completely different. The same words can have different meanings too in both languages. It can be quite confusing to foreign people. Well, they mostly think we're German, so I guess it doesn't really matter.