The Tampuan (also spelled Tompuan or Tampuon) are an indigenous ethnic group living in northeast Cambodia. Numbering about 25,000, the Tampuan people live in the mountainous Southern and Western portions of the Cambodian province of Ratanakiri. They have their own language of the Mon-Khmer language family. Tampuans are often classified as both Khmer Loeu or montagnards, a designation given to all hilltribes in the former French Indochina. Though historically the language has been without a writing system, in the last ten years EMU International has overseen the creation of a phonology and writing system, based on the Cambodian alphabet.