A great place to go to about movie questions is imdb.com (Internet Movie Database). It gives you info about cast, producers, ratings, reviews, trivia, quotes, goofs, why it was given the R (there's almost always a parent guide), etc. I go there all the time if I just want to know more about a movie, to watch a trailer or to see why it has the rating, etc. if I'm not sure I should let my kiddos watch.
So, for instance, I looked this up. The Motion Picture rating just said R for language. However, the parent guide said this:
1. Sex & Nudity
The word "tits" is used in a non-sexual aspect.
Some kissing. No sexual situations, nudity, or semi-nudity.
2. Violence & Gore
King George V is shown dead in his bed.
News about Nazi-fueled atrocities is broken, but no gruesome images are shown.
3. Profanity
The f-word is used about 11 times, as with "sh**", "bastard", "tits", and "bugger". However this is in the context of the Prince's speech therapy under the supervision of his therapist, which is meant as a way of venting stammer-fueled stress.
4.Alcohol/Drugs/Smoking
Some smoking is shown. This especially applies to Prince Albert who was instructed by previous doctors to smoke to relax his throat. However, his speech therapist, Lionel Logue, is firm in that he will not allow smoking in his office and tells the Prince that any doctor who would advise people to smoke for the good of their health is a fool.
Alcohol is consumed in a party scene and also during several conversations, but not to excess.
5. Frightening/Intense Scenes
The film begins with Prince Albert having to give a speech at the British Empire Exhibition. Given the character's speech impediment and the highly public setting making him especially ill at ease since this is also his first live radio address, his resulting embarrassment at this public fiasco is painful to watch. The scene in which he discusses his difficult childhood is also very strong emotionally.
Please note also in England this film's certificate has been downgraded to a 12A (for strong language in a speech therapy context) from a 15.
Recommended for children 12 and up
Does that give you a clear picture? Considering what this is about (I've heard great things about it, what to see it but haven't yet), and based on this, I would let my child watch if I thought they were mature enough to handle it. Another thing that I've noticed, IMDB is pretty good when it comes to their star ratings. If the movies have a high star rating on their site, 9 times out of 10, it's going to be a great movie (rarely have I been disappointed in that area) and this movie has 8.5 of a possible 10.