The violence reaches an intense level when cute and cuddly mummified pygmies hit the scene, only to pick off people like crazed assassins. And for those with weak stomachs, let's hear it for the return of the killer beetles. They routinely invade bodies and explode them. Or, if they're actually in need of a meal, they simply dine on their human hosts. With respect to language, Mummy is relatively tame.
Sex makes an appearance only in the form of scantily clad women.
Those nightmares aren't worth dealing with for a month. It's a borderline call, but children 12 and older can handle this movie.