There's a LOT of commonly-encountered tags that have no wiki entry at all (and a lot of one-off tags that DO have a wiki entry, for some reason). Namely, what's the difference between "Translated", "Translation Available", and "Untranslated"?
For instance, if there's a translation in the comments, does it still count as untranslated, or does it go into translation available? If there's a post with notes, does it count as translated or does it count as translation available? There's also a few empty wiki pages that I think I could try to explain, but is the policy "Don't try if you don't know for sure" or is it "Do the best job at it you can"? I'm no expert, but I think I could do a decent explanation of what things are :U