Historically most have been lumped together as a single Warapu language, with Nouri variously classified.
They are spoken in the Sissano Lagoon area of West Aitape Rural LLG, Sandaun Province, Papua New Guinea.
The Piore River runs to the west of all the languages, and so speakers do not find it an acceptable name.
Bobe is coordinate with the rest, which might be considered (divergent) dialects of a single language.
The Sissano Lagoon convergence zone is at the northeastern end of what Donohue and Crowther refer to as the "North-Central New Guinea" (NCNG) area, which is a highly linguistically and culturally heterogeneous area marked by the lack of widespread trade and cultural diffusion due to geographical isolation among groups; the "NCNG" area ranges from just east of the Lakes Plain region to the western edge of the Sepik basin.