Can't wait to use this app, the video looks promising! Considering the globalized world we are living in, learning and sharing more about our respective cultures is what we need, and not only stay with like-minded people (which we often tend to do). What is also great about it is that it is open to multiple customer segments as the app seems fairly easy to use.
However, I would maybe advise to try and modernize the design a bit to make it slightly more inviting to young adults (different colors maybe?) as myself.