The Navajo and Hawaiian courses are really empty, no offence to the people who made them, but even the intro just says "Intro" and there are very few skills, were they released by accident?
General consensus is that it's a glitch. Hopefully that's the case and we'll get courses that are more developed in a few weeks.
Navajo does seem a little bit sketchy, but I think that Hawaiian is like that just because they haven't had a lot of time to work on it yet. The people working on these courses may be new to contributing.
I thought they would have been withdrawn by now, but it's late in Pittsburgh. I would still guess they will disappear next week.
I just finished the Navajo course, and I'm not really sure what the thought processes were in choosing the vocabulary. I've never needed to say "Beauty is below me" in any language. But I would like to know how to ask where the restroom is.