Nobody :(
My mom never cooked, we almost always ordered out pizza or take-out chinese. My dad can cook, but I did not grow up with him. I also never learned to cook, growing up my older siblings would cook for me if my mom wasn't and make me clean. Then I went to college where I could eat at the dining hall. Then I joined the Army where your food is made for you and once again you're doing a lot of cleaning. So unfortunately I've never realy learned how to cook.
I'm lucky though now I live with my girlfriend and her family and they're Cuban. They all cook very well and they constantly make excellent food and lots of it. My girlfriend's mom is the best cook, and if it wasn't for her my diet would consist of take-out and chocolate chip cookies for breakfast.

As others have said, I think it's to be expected. If I can tell they are a non-native speaker, and they begin speaking formerly, I'm usually more impressed than anything, and while it might feel aloof, I would no it's not their intention. A good example would be I work with a lot of Dutch people, who have great but very formal english skills, and I am more likely to just respect them for knowing English and trying to speak my language than to judge their speaking style.

Also as another said, it's better to learn English in a formal manner, then learn some slang and idioms, then to do it the opposite way around.

The most important thing to remember here for your friend, is that most communication is non-verbal. As long as he can communicate clearly in English it doesn't matter how he does. However he should take some time to study the body language of his target culture (most english speaking cultures are very similar). Pay attention to how far we stand from each other when speaking, how loud we are, what we do with our hands, etc. Generally speaking if a person in a social situation doesn't invade my personal space, and smiles a lot, everything will be alright.

Elias, I was under the impression that Ghibli had an older target audience, where as Disney is aimed at young kids. Plus anime is seen more as an art form, where in the U.S. animiation is seen as something only for entertaining children.
And Star Wars, was only partially based on the Japanese film, (sorry I'm a huge Star Wars fanboy).

I would agree overall that the content is different, I just think you have to look at the reason why, most films in the U.S. are produced with the intention of earning money and providing quick easy entertainment, not to be literary pieces.