The fictional language spoken by the Na’vi in James Cameron’s Avatar is called Na’vi.
Cameron’s film required a constructed language that could sound natural while remaining distinct from existing languages. Linguist Paul Frommer developed Na’vi for Avatar, creating its vocabulary, grammar, and pronunciation in consultation with the production team.
Na’vi is spoken by the indigenous people of Pandora, including Neytiri and other characters encountered by Jake Sully. The language was designed for use in dialogue rather than as a brief collection of invented words, so it includes grammatical structures and a growing vocabulary used by fans.
Na’vi is sometimes confused with other fictional languages, especially Klingon from Star Trek or Dothraki from Game of Thrones. Those languages belong to different fictional worlds and were created for different productions. In Avatar, the language’s name comes directly from the Na’vi people, whose relationship with Pandora is central to the film’s story.