Mainstream Kenyah, also known as Usun Apau and Bakung, is a Kenyah dialect cluster of North Kalimantan, Indonesia, and Sarawak, Malaysia. Dialects fall into four clusters:

• Lepo’ Tau, Lepo’ Bem, Uma’ Jalan, Uma’ Tukung^[2]
• Lepo’ Ke, Lepo’ Kuda
• Lepo’ Maut, Lepo’ Ndang, Badeng (Madang)^[3]
• Bakung, Lepo’ Tepu’ (Lepo Teppu’).

• Kaipuleohone's archive of Robert Blust's work includes notes on Kenyah language