In the cafeteria scene J.D. can be seen approaching the table behind Elliot, but when Carla talks to Turk, his tray is already on the table even though he doesn't sit down until the next shot.
In the Cafeteria scene, when Elliot says "I hate Turks", the man at the behind table wasn't Turkish, he was Arabian-Indian.
In the cafeteria they are talking about Turks and they refer to Omar who was clearly an Indian Sikh man from India. Turks don't wear turban. And JD was supposedly speaks Turkish. It is not Turkish, it is gibberish.