The good stuff
The film has a stirring message: Our biggest limitations are the voices in our head that remind us of all of our imperfections and failures. But they're only voices, and our will is stronger than our fears. The film has some classist overtones, but they’re placed within historical context.
The three main characters serve as strong role models: Lionel Logue, though somewhat untraditional in his approach to speech therapy (at least for the movie's time period), believes in himself so much that he’s able to help others do so, too. The queen is a lesson in being supportive without condescension, and King George VI is a man not to be denied his life because of his past.
What to watch out for
A character struggles with his temper, which is fueled by frustration.
A king abdicates from the throne because of his involvement with a divorcee. There are references to her “talents” behind closed doors.
Strong language includes “bas-ard,” “bloody,” "t-ts," "d--n," "a-s," "h--l," and “bugger.” And in one memorable scene, a man yells out a stream of words like “s--t” and “f--k.”
Not an issue.
Drinking, drugs, & smoking:
Some social drinking (sherry, whisky, wine).