The series doesn't have any sexual references or nudity in it.
The only thing is that Günther is urinating in one episode. A three cover is genitals. The scene is mean't for comedic purposes.
Violence & Gore
None
Little to nothing. The show got minor slapstick voilence i some episodes.
Three "Nisser" chrases a plane. They are all right.
Günther cut himself with a knife. It's for comedical purpouses and the little blood wich is shown is green.
Benny got a voilent behavior in some episodes. He doesn't hurt anyone whatsoever.
Profanity
Mild
Little to nothing.
The "Nisse" Günther says: Shit, it's på Norsk in multiple episodes.
No uses of Fuck whatsoever.
Damn and hell is used.
Name-calling.
Alcohol, Drugs & Smoking
Mild
The Nåså (Benny) get a somewhat weirds reaction to alcohol. He get's vampire theets and glasses and become weird. He is seen drinking heavily in some episodes
Olaf Sand is smoking a pipe in multiple episodes.
Frightening & Intense Scenes
Mild
The Nåså, Benny might be frightening both drunk and sober.
The slideshow of Nåså images might be scary to younger viewers. When i was a kid, they always scared me.
Benny again, in the first episodes he is seen walking on a road. Might be scary.