I think there will be some interesting and important battles around ownership of voices and art and so on, but I’m very much inclined to agree with language as owned by humanity in general 
We overlap on the Celtic languages, so you can expect movement there sooner rather than later! And that will force us to do some of the structural work on how we open up the course production system to work with crowdsourcing, at which point it will all come down to whom you can inspire 
[We’re currently thinking (and it’s very much my desire) that crowdsourced courses would naturally be free to use].
We have a ‘skip’ function which we think will broadly work for this [er, where this = your comment about getting to intermediate content!] at the moment - we have to juggle between ‘actually competent intermediates who need to move quickly to appropriate content’ vs ‘intermediate on paper but have never said more than five words together out loud’ who need to be nudged into not going too far ahead and then losing their will to live…
Next year, I hope we’ll have moved on to what we’re thinking of as version 1.3 of the app, where we start paying attention to user behaviour in a way that helps us tailor the content to the user - when we get this working well, we’ll also be able to build a tool to let people showcase their existing skills in order for us to do better at starting them on appropriate content