The movie has an uplifting message about how Mandela led South Africans by example by rooting for a nearly all-white rugby team to foster national unity. Mandela's love of the poem "Invictus," which he had up in his prison cell and later gives to the captain of the rugby team, means "unconquered" in Latin and has an inspiring message: "I am the master of my fate, I am the captain of my soul."
Rugby is a pretty violent sport, but otherwise, there's no conventional violence except for when an angry white South African throws a soda cup in the vicinity of President Mandela. In another scene, Mandela is shown collapsed on the floor.
Francois kisses and hugs his wife a couple of times, and the night she visits him before a big match, he says they "can't" but that he needs her for "inspiration," and then they start kissing. A presidential guard flirts with Mandela's secretary.
The rugby team occasionally swears (though considerably less than you'd imagine professional athletes cursing) -- one "f--king" and a couple of "s--t"s is the worst of it. Otherwise, the strongest words are "bastard," "freakin'," "crap," and "damn."