what language???

Just now watching the pilot episode. Does anyone know which language these people are using? When I called the phone number that was on back of the 9 card that was given to Madison, it says "welcome back reverti" (at least it sounds like reverti), and then someone starts this long conversation in this unknown (to me) language. Is this a real language that anyone recognizes, or is it made up for the show???? Thanks a lot!