Usarufa is a Kainantu language spoken by the people of the same name in Papua New Guinea

Papua New Guinea

Papua New Guinea , officially the Independent State of Papua New Guinea, is a country in Oceania, occupying the eastern half of the island of New Guinea and numerous offshore islands...

. It belongs to the Gauwa branch of the Kainantu family of the Kainantu–Goroka languages. Its ISO 639

ISO 639

ISO 639 is a set of standards by the International Organization for Standardization that is concerned with representation of names for language and language groups....

 code is usa.

As of 2009, the language was reported to have had about 1200 speakers and no fluent speakers below the age of 25, which makes it an endangered language

Endangered language

An endangered language is a language that is at risk of falling out of use. If it loses all its native speakers, it becomes a dead language. If eventually no one speaks the language at all it becomes an "extinct language"....

.