The reverse is more than true. She has a 2-3 yr. old's understanding of English, though she often pretends not to understand (she's a Chessie, so that makes sense...).
I'll never forget, from many many years ago, a talking dog that said "Hamburger", on the Tonight Show, I suppose.
Of course, it was more like "Mah mah mah", but I bought it. It was one of those horribly pampered little bulldog type things.