Roro is spoken in Morobe Province, near Kairuku
shores of Hall sounds between Yule Island and mainland in
the nortwest of Port Moresby in Papua New Guinea.
Almost all pairs of vowels can be found;
syllabification of these is apparently variable.

Bluhme, H. 1970. The phoneme system and its distribution
in Roro. In S.A. Wurm and D.C. Laycock (eds.), Pacific
Linguistic Studies in Honor of Arthur Capell (Pacific
Linguistics, Series C, 13): 867-77.

Davis, M.M. 1974. The dialects of the Roro language of
Papua: a preliminary survey. Kivung 7: 3-22.