Cursing in Transformers 3?

My son loves the transformers toys and wants to go see the new movie. I don't mind the violence as much as I am nervous about the cursing. TF2 had repeated unnecessary cursing and I was wondering if this had been toned down a little bit in the third installment. I realize the movie is rated PG-13, that's not what I am asking. I took him to see Thor, which was PG-13 and I thought that was completely fine. It might have had a couple of bad words, but it was not something you noticed throughout the whole movie. If anyone has seen the movie and could give some feedback I would appreciate it. Thanks!