I'm doing a more social language learning app, starting with helping couples learn languages from each other. So it's like multiplayer Duolingo + Anki. Won't be

I'm doing a more social language learning app, starting with helping couples learn languages from each other. So it's like multiplayer Duolingo + Anki. Won't be open source, but I plan on an API with import / exports from Anki https://learncoupling.com https://learncoupling.com