Trivia: The creators of the show, Matt Stone and Trey Parker, based the Stan Marsh and Kyle Brosfloski characters after themselves (Stan being Parker and Kyle being Stone.) The Eric Cartman character was partly based on Archie Bunker.
Trivia: Camryn Manheim uses sign language with her client, played by Marlee Matlin. Before becoming an actress, Camryn Manheim actually worked as a sign language interpreter and job trainer/placement specialist for the deaf. She also used her sign language skills in an episode of "Law and Order" called "Benevolence," where she portrayed a defense attorney for a deaf man accused of murdering his girlfriend.