1 use of 'fuck' in the entire show.
Infrequent use of mild language (ie.hell, damn, pissed off, fricken, etc)
One episode has a character referring to a transgender woman as a "he/she" which is considered a derogatory and offensive term by many.
Various insults (weirdo, creep, looser, etc)
One episode has a character using the word "douche"
Reference to the show "Jackass"
Character uses the abbreviation LMAO (laughing my ass off)
PG Level Language.
The worst it gets is mild. I have no idea why it says moderate. It absolutely isn't.