These are really good. We went out with friends last night, and part of me was working on the dryad one. Never figured it out.
I played French Scrabble a week ago, and while my French is pretty good, I'd never played Scrabble in it, and I have to say it was pretty hard, and clearly was exercising different parts of my brain, so I'm especially impressed at the non-native English people's skills in this thread.