They have sharp scissors and razors. They can speak whatever language they like. Seriously if the level of conversation is becoming so loud that you are being talked over it would be polite for one of them to say “Please excuse us we’re just talking up the new Star Wars we don’t mean to be rude” for example. The apology more for disturbing you and not for speaking Italian.
If you read post #81 you will have a better understanding of what I am trying to say.