I'm a big fan of not giving the players information, making them earn it. For example, I once GM'd a game and had a merchant say his caravan was attacked by trolls, when the things were ogres. Much fun to be had as the PCs loaded up with oil and torches, only to have a couple ogres come swinging at them. "I thought trolls were green?" "Burn the bodies just in case!"
Anyways, I'm doing the same thing with this AP. Right now, the players have given a new name to one type of creature:
I had shown the picture of the creature to them, gave a description, and now the players always refer the critter as . . . well, the wrong name.
The best part is that when I'm looking up the stats in my conversion document (I'm running True20), I keep looking under "C" instead of "S."