Comment by koiueo

I realized, I don't know many cases of Spanish or Chinese people not learning the language.

My hypothesis: I understand russian and register cases like this easily. Otoh, I don't understand Chinese, so the ones with whom I have ever had any communication, are the ones who learned any of the languages I understand. Similar story with Spanish, my level is ~A2, so there's bias here too, although slightly less prominent.

Do you understand russian?