Iaai is a language of Ouvéa Island (New Caledonia). It shares the island of Ouvéa with Fagauvea, a Polynesian outlier language.
Iaai is the sixth-most-spoken language of New Caledonia, with 4078 speakers as of 2009. It is taught in schools in an effort to preserve it.
The language has been studied by linguists Françoise Ozanne-Rivierre and Anne-Laure Dotte.