>>18329793>japaneseUseful if you're a diehard weeb or if you want to work for a Japanese megacorp like Mitsubishi
>latinUseful for etymology, philosophy, or if you're tradcath
>germanHas a massive literary tradition
>russianHas a large literary tradition
If you're going strictly pragmatically, I'd suggest German. But I'm also a Latinfag so I'm biased towards suggesting that