THE TERMINAL isn't really a movie about one thing. It's a fish-out-of-water comedy, a romance, a quirky character study, and an inspiring fable. All of these things play out wonderfully, and though I was a bit disappointed with one part of the end, I highly enjoyed it.
Really, this movie should probably be rated PG. Language is mild: a few "a*s"s and "s**t"s, and in one scene Hanks repeatedly says the word "cheat" and it is muddled to sound like "s**t" (played for comic effect). The Zeta-Jones character has an affair with a married man, so there are some mild references to adultery. She says she would quit, but she wishes "the sex wasn't so amazing". There are some illegal drugs contained in airplane packages, but none are used.
This is as sweet a family movie I've ever seen, and it's less racy than a lot of PG rated movies. Highly recommended.