Rumu language

Rumu, or Kairi, is a Papuan language of Papua New Guinea. Other names for it are Dumu and Kibiri.

Phonology

/r/ is pronounced when word-initial and before /ɛ a ɔ/.
/w/ is before /i e ɛ/.
/s/ only occurs in loanwords.

	Front	Central	Back
High
Mid-high
Mid-low
Low

/ei/ has merged to for many speakers.
/oi/ has shifted to for many speakers.

Additionally, Rumu is tonal, distinguishing four tones: falling, rising, peaking, and level.