Hattam, also spelled Hatam, Atam and also known as Borai or Mansim, is a divergent language of New Guinea. It is not closely related to any other language, and though Ross (2005) tentatively assigned it to the West Papuan languages, based on similarities in pronouns, Ethnologue and Glottolog list it as a language isolate or small independent family. Following Reesink (2002), Glottolog lists Mansim, with rumours of 50 speakers, as a distinct language.