I'm half English and half Swedish, so I'm fluent in both those languages.
I live in Scotland, so I understand (and can even speak, sometimes) the accent.
I studied in Durham, so I can understand the Northwestern accent. At a pinch.
I also went to school in Brussels, so I have conversational French and Dutch, and (very) elementary Latin.
I collect Donald Duck books in various languages, so can read Norwegian, Danish and German without too much difficulty. With sufficient time and an online dictionary I can make sense of Italian and Spanish, but I'd rather not.
I'm married to a South African, so I'm (slowly) learning Afrikaans and Zulu.
And over the years I've picked up a few words - certainly not enough to be useful - of Russian and Greek.
I know about eight words of Finnish but can't understand or speak that bloody language because, well, who the hell can? ;-)
(Apologies to the Finns for that... Couldn't resist.)