Wambule is a Kiranti language language spoken by the Wambule Rai, one of the Rai groups belonging to the Kiranti (किरान्ती) ethnolinguistic family of eastern Nepal. Wambule is spoken by more than 5000 people living around the confluence of the Sunkosi (सुनकोसी) and Dudhkosi (दूधकोसी) rivers near Kui-Bhir Hill. The Wambule-speaking area comprises the southernmost part of Okhaldhunga district, the westernmost part of Khotang district, the northernmost part of Udayapur district, and the northeasternmost part of Sindhuli district.