Andy Kaufman had invented the persona for his character in his comedy act prior to working on the show, including the famous line "tank-you-veddy-much". It was the show's writers that came up with the name of Latka Gravas. Kaufman created Latka's language, which he taught to Carol Kane for her role as Simka, by inviting her to dinner and refusing to let her speak English.
The series was inspired by a 1975 article in New York magazine titled "Night-Shifting for the Hip Fleet" by Mark Jacobson. James L. Brooks and David Davis read the article which was about several drivers who worked the night shift for a New York cab company.
"Reverend" Jim Ignatowski: The ability to witness two men stand toe to toe in the spirit of sportsmanship and pummel each other into insensibility is what separates us from the animals.