The Nafsan language, also known as South Efate or Erakor, is a Southern Oceanic language spoken on the island of Efate in central Vanuatu. As of 2005, there are approximately 6,000 speakers who live in coastal villages from Pango to Eton. The language's grammar has been studied by Nick Thieberger, who is working on a book of stories and a dictionary of the language.