Have you heard of mystery Skype? Basically two classrooms get together on a video call and play 20 questions trying to figure out where they other class is located.
It seems pretty popular
It has even moved to Google Hangouts
It just seems natural to me that we would add the component of language to the mix. Evidently, I'm not the only person to whom this idea has occurred. https://education.skype.com/projects/5823-play-with-us-mystery-skype-in-french
So here it is a google spreadsheet. Add yourself to the list and connect on your own.