Promos aren't scripted so wrestlers can pretty much say what they want to an extent.
TV-14 level language is frequently used in every episode, especially "Shit", "Asshole", "Damn", "Bitch" and "Dick". Other words are used as well. "Fuck" is used as well, not not as frequently due to the TV-14 rating, and it is sometimes bleeped.
Dan Lambert probably says the most
Dan Lambert probably says the most curse words in the entire show since he has come to AEW.
On the January 19, 2022 episode, Jon Moxley (fka Dean Ambrose) unleashes an F-bomb at a heckler, which isn't bleeped.
On the June 1, 2022 episode of Dynamite, Maxwell Jacob Friedman, known as the initials of that name, called Tony Khan a "f***ing mark" during a pipebomb involving a contract termination demand. 11/292023 Adam Copland said go fuck youself.
Moderate level TV-14 swears are used. "Fuck" is infrequently used although it is sometimes bleeped.
In another 2023 episode, Christian Cage and Adam Copeland yell "Go Fuck Yourself!" towards each other.