40 percent certain, based on the evidence available
23,000 on Sumba Island. (2008 Population Registration) The number does not include speakers living in places other than Sumba island.
SPEAKER NUMBER TRENDS
Sumba Island. The Nggaura or Gaura lexicon shows a mixture of Laboya and Kodi. Nggaura is located in the border between Laboya and Kodi. The Gaura people now have a new district, Laboya Barat, which was previously under the district of Lamboya. (I Wayan Arka, personal communication, November 2011)
Information from: “Ethnologue: Languages of the World, 18th Edition” . Lewis, M. Paul, Gary F. Simons, and Charles D. Fennig · SIL International
20 percent certain, based on the evidence available
(Grimes et al. 1997)
DATE OF INFO
"Nusa Tenggara Timur Province; Sumba island, southwest coast, southwest of Waikabubak city."
Sumba Island, in Eastern Indonesia.
Information from: “Glottolog 2.3” . Hammarström, Harald & Forkel, Robert & Haspelmath, Martin & Nordhoff, Sebastian (2014)