This is still one of my favorite animations. I agree, it is quite crude for a children's cartoon, but it's still really mild. If your kid watches Pirates of the Caribbean or anything Cartoon Network, then this should be fine. Most of it I remember completely flying over my head, even when I was 12.
It really is just plain funny, and it's great for adults too. Entertaining all the way through and super well done. I feel everyone else is being a bit to critical about the language in it. This is OK for kids I believe.