I've had scam calls in Spanish and Chinese this year.Numbers that I don’t know, I answer in Spanish. ( I know maybe 20 words ) The scammers stop calling when they figure out they can’t communicate with me.
I did have a debt collector hounding me many years back and I had my friend from Poland answer and start yelling at then in Polish. Those Eastern European languages sound really angry even when they're proposing marriage or congratulating each other on the birth of a first child. They might teach Pajeet or Muhammed a little Spanish, but they certainly don't teach them Polish.