If you are gonna use divisions and subdivions all at the same time (different levels of the "familylanguage-tree"). You should atleast make it clear in the the description. Because if you have guessed one language family, naturally you think you are done with that one and do not need to name the languages that are contained in that specific group individually.
It is like using different rules all at once. (Like in an animal quiz, for some answers accepting mammal, or fish, while for others requiring the exact subspecies) From your previous comment I get you choose where a name first showed up. But it makes for a very inconsistent quiz. And I think most people will run into this problem.