Bosavi

Bosavi, also called the Papuan Plateau languages, is a family of closely related Trans–New Guinea languages named after Mount Bosavi, on the rainforest plateau east of the Strickland River.

Its members spread across the plateau and the flanks of Mount Sisa, and include Kaluli and Sonia, Kasua and Onobasulu, together with Edolo–Beami, the language of the Beami people. Dibiyaso, once listed with them, is often treated as an isolate.

The peoples of the plateau live in small longhouse communities in dense rainforest, drawing their living from sago, garden crops and forest game. When Yñigo Ortiz de Retez gave New Guinea its name in 1545, this inland plateau lay far beyond any European route, and its languages continued to develop untouched by the outside world until the colonial era.