FAQ for
The Ruins (2008)

I don't have one, that's why I wanted to ask

Probably a dialect of Mayan. According to http://www.nvtc.gov/lotw/months/November2005/mayan.html

"The Mayan language family is a group of 69 related languages spoken today by over 6 million people in Central America. "

This also could possibly be Nagual or Nahual (both pronounced [na'wal]). While in Mexico myself we met about 5 people who spoke nothing but this beautiful and dying language,

Yes, they laugh, torment you, and mimic cell phone rings.