[quote=@DepressedSoviet]
[@Dannyrulx]I'd imagine it be more that he knows language groupings. Like knowing general "Slavic" language instead of specifically Russian or Polish. He might know "Germanic" instead of specifically German or Dutch. There'd be some room for people to misunderstand him, but he'd still be skilled at deciphering language, so it would be significantly less OP, while still achieving the same goal.
[/quote]

Yeah. I imagine him definatly knowing Latin, so that's all the South Europe languages (Portugese, French, Spanish, Italian,) right off the bat, and probably one or two other ancient languages.

Fluent German and English though; he's going to come from a Jewish German family who left the country and went to England.