Information from: “Sepik languages: checklist and preliminary classification” . Laycock, Donald C. (1973) , Wurm, Stephen A. · Australian National University, Research School of Pacific Studies, Department of Linguistics
20 percent certain, based on the evidence available
This figure includes estimates for Imonda, which is treated as a dialect of Waris by Laycock (1973), but, following Seiler (1985) is included as a separate language in the Catalogue. Indeed, Laycock writes: "The dialect spoken at Imonda is very distinct, and is regarded by Imonda villagers as a separate language."
DATE OF INFO
Papua New Guinea; Indonesia
15 villages in Papua New Guinea: Dauchendi, Daundi, Doponendi, Epmi, Imonda, Kolosa, Machendi, Mindepoke, Namola, Omol, Sainendi, Swach-Ketjil, Tokonendi, Wainda, and Yuwetla; 10 villages in Papua Province, Indonesia: Ampas, Kok, Komieti, Major, Mingk, Oum, Pendesi, Sach, Senck, and Swach.
Information from: “Glottolog 2.3” . Hammarström, Harald & Forkel, Robert & Haspelmath, Martin & Nordhoff, Sebastian (2014)