Despite everything else, Marge still loves Homer, and that's a positive message....
That said, you see Bart's "weiner" at one point, and there was one "goddamned" at the end, which was for shock value (and it worked for that moment for many in the theater). I remember that there was probably other language that you wouldn't hear on the show scattered through, but I really don't remember anything specific, other than the aforementioned "G-d".
My 11-yo son had a wonderful time and the thing he's talking about most this morning is the Alvin and the Chipmunks trailer. (We saw a lot of trailers and commercials because we got there early. You know, I knew that they were remaking "The Bionic Woman", but I didn't know that she was going to have a British accent.)
Thanks. My wife has a problem with some of the stuff they do on the show. But my retort is usually; At the end, the still love each other.