Rumu language

Rumu (Rumuwa), or Kairi (Kai-Iri), is a Papuan language of Papua New Guinea. Other names for it are Dumu (Tumu) and Kibiri.

Phonology

 * /r/ is pronounced [l] when word-initial and before /ɛ a ɔ/.
 * /w/ is [β] before /i e ɛ/.
 * /s/ only occurs in loanwords.
 * /ei/ has merged to [i] for many speakers.
 * /oi/ has shifted to [ui] for many speakers.

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