As a bit of an Elder Scrolls geek, I enjoyed this title and would recommend it to most people who enjoy RPGS as long as they are over ten.
The cartoony graphics tend to lighten the game. So long as your child is under supervision or is trust-worthy, then you have nothing to worry about. The worst nudity gets is when a character can get in their underwear, but with Mods from sites like "The Oblivion Nexus" and "Planet Elderscrolls" can add nudity. The worst that sexual features get in the game can be found in books, while one quest involves a gang of female brigands who lure males from pubs to their house offering them "Favors" and instead taking their coinpurse.
The worst violence gets is that sometimes you will see a dismembered head or a hand. But the player can get a mod (As mentioned before) to remove these and help "Nerf" the game's features a bit. Some characters can die in scenes, and these aren't disney deaths. When someone dies here, there is nothing you can do but take a momento from the scene of the death and bring it to a temple (No spoilers) or make a little shrine, or even loot it for yourself.
A player can indulge in criminal acts and join an assassin's guild or a thieve's guild, but only if they commit the acts in the first place. Stolen items may not be sold to normal merchants, and if a guard catches you stealing, all the cities will try and arrest you. So criminal acts really come down to the player's conscience, or in my case, what they want the character to be like.
There is some humor in the game and a good deal of fun to be had if you aren't being too serious about it and looking at it as War and Peace.
Players can drink alcoholic beverages, but these have negative side effects and as such, can annoy players into no longer drinking (Parenthood lessons!)
As the player explores the game, it can be a timesuck, but with a bit of wise decision making, a parent can make this experience a good one.
Now, if you want a kid under 13 to play, you may want to "Mod" the game by adding files to it, thus making it more appropriate. One of these mods removes blood, another removes any dismemberment, another replaces hanging corpses with companion cubes (Portal/Portal 2) and much more. If you intend to mod the game, be careful. Make sure to read about the mod and only download from a reliable source. I recommend "Nexusmods" or "Planetelderscrolls". The first one mentioned has a download manager that makes mod installation easy.
Now, this game was a bit harshly reviewed, and for good reason. But really, the writers here seemed not to have played through the entire story. I will not spoil ANYTHING, but throughout the story, characters can sacrifice their lives to help you save innocent lives, and these characters are honored in a memorial involving swords.
Cursing is no problem. The word h*** or s**** is seldom used, nor is f****. Minor words such as "d***" are used, but h*** is often replaced by "Oblivion" which is a sort of netherworld in The Elder Scrolls' world.
Being frugal is encouraged, as some of the best items can only be earned by spending "Septims", the currency of Tamriel. I found myself doing math problems to manage my expenses, so yes, this is a game that should be given a fair chance. Do not trust my review, nor anyone else's. Look the game up, watch some videos, learn the lore of the world, talk to your kid, and then you are fit to choose whether or not the game is good for your child.
Take your sword in hand, parent. For this is your time to make a decision, your time to shine, your time to matter. Choose wisely, as each choice could have downsides and upsides. Your child is unique, they are special and one-of-a-kind. Shouldn't your choices be based on them, and not other children and their parents?