Typo in "Solar" skill description
The heading of the second paragraph (after "Introduction to Gender") is "The Lunar Class", when it's pretty clear it should be "The Solar Class".
(Just adding this here to keep it with a relevant post.)
There are some (well, 1 more for now) in other places in the tips and notes too.
The genitive case is assigned the possessor in a possessive phrase. In English, we mark possessor's in two ways:
[This one amused me, it could be a deliberate joke.]
It just needs a fresh pair of editing eyes to go over them I guess.
I'll edit this or post here again if I notice any more.