The big picture
I doubt I'm right, so this probably isn't a spoiler . . . but maybe it is! You've been forewarned.
I'm guessing that the reason for the "cutesy" baby talk, the fact that Stanley is so short and childlike, and the reason the Arkenhammer looks like it is (and the reason Wanda looks like she does, for that matter . . . who knew a chick with a head bigger than her torso could look hot?), is because it's all some kid's home campaign world. Presumably Stanley is the GM, or world designer, or something.
"I feel" . . . that Erfworld rocks