|(5,500 cited 1990 census)|
Isinai (also spelled Isinay) is a Northern Luzon language primarily spoken in Nueva Vizcaya province in the northern Philippines. By linguistic classification, it is more divergent from other South-Central Cordilleran languages, such as Kalinga, Itneg or Ifugao and Kankanaey.
- Reid, Lawrence A., and Analyn Salvador-Amores (2016). Guide to Isinay Orthography. Baguio: Cordillera Studies Center, University of the Philippines, Baguio.