This is a genuine question. I’ve always had an interest in learning languages and I have a list I want to learn. I am already somewhat decent in Spanish, so I’m picking up that, practicing my Portuguese, going to learn French and Italian, maybe German, learning Polish, and possibly Russian.
I already canceled the idea of living in Russia due to obvious reasons, but will I have any need to learn the language? Will it be useful? Will that be offensive? Many people HATE Russia and the language.
It is never a bad idea to know the language of your enemy.
Which reminds me: I heard of a story about a Chinese American helping South Korea’s side during the Korean war and like yelling “别开枪，自己人” (“don’t shoot, friendly”) in Mandarin and confusing the PLA, it was such an intriguing story.
Of course, if you look up that story in Baidu search, dude’s branded as a race traitor.