Oh, I agree. Any time I’m in public and someone is speaking in another language, I eavesdrop. I just love listening to it.
My fiance was born in Nuremberg, Germany. He lived there until he was about 12 and then perhaps illegally came to the states. I would pester the hell out of him to speak to me in German.
Our downstairs neighbor is Russian and I adore talking to her to hear her accent. She invites, assuming, family members over and they all speak in Russian.