French
Pros: Similar vocab to England, 2nd most widely taught language, major global language
Cons: difficult grammar compared to spanish, hard pronounciation, too many irregulars
German
Pros: None
Cons: Lots
Latin
Pros: Very useful as its the basis of most european languages, apparently not that hard, especially if you have knowledge of french
Cons: no one speaks it
Russian
Pros: Deep, almost romantic sounding language, is rare, useful if your an american patriot, people will think your intelligent for understanding cryllic
Cons: difficult grammar, have to learn new alphabet(not that hard though), russia is generallyhorrible