As with most Dave and Channel 4 comedies, there is strong language heard in every episode, mostly "Fuck" and "Shit". Sexual slurs are used as well. A pre-watershed version of the series called "Taskmaster Bleeped" also exists which as the name implies, has all strong language bleeped out and alternate takes to clean out the humour.
"Cunt" has been used at least a few times in the entire series. It was said once by Daisy May Cooper in Series 10 and Julian Clary in Series 16. All instances of the word are bleeped regardless of which version is shown.