Fluently
Languages that I can communicate in without major difficulties. I regularly read books in all of these, and have worked full time in both English and Finnish:
English (native)
Finnish
German
Proficiently
I can communicate well in these languages, but there are holes in my knowledge and I may have to stop and think:
Esperanto
Hungarian
Russian
Intermediate
I wouldn't count on being able to discuss anything complicated in these languages, but basic conversation is doable:
Arabic (MSA/Fusḥa)
Klingon
Moksha (possibly)
Spanish
Welsh