The Apo Duat or Dayic languages are a group of closely related languages spoken by the Kelabit, Lun Bawang, and related peoples. They are:
- Kelabitic: Kelabit, Lengilu, Sa'ban, Tring
- Lundayeh: Lun Bawang, Adang, Balait, Kolur, Lepu Potng, Lun Dayah, Lun Daye, Padas, Trusan, Mengalong
Putoh may be an additional language, or it may be a dialect of Lundayeh.
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