The Vietic languages are a branch of the Austroasiatic language family. The branch was once referred to by the terms Việt–Mường, Annamese–Muong, and Vietnamuong; the term Vietic was proposed by Hayes (1992), who proposed to redefine Việt–Mường as referring to a sub-branch of Vietic containing only Vietnamese and Mường. Many of the Vietic languages have tonal or phonational systems intermediate between that of Viet–Muong and other branches of Austroasiatic that have not had significant Chinese or Tai influence.