Penutian is a proposed phylum uniting many small, largely extinct or moribund Native American language families of the Pacific coast and California interior; the surveyed Wikipedia treatment discusses classification history and evidence at length but states no current aggregate speaker count.
What would resolve this A published tally of living speakers across the Penutian phylum's still-spoken member languages, or a specialist statement that essentially none remain, from a source such as Golla's California Indian Languages.
OpenHistorical linguistics and language documentation (California and Plateau indigenous languages).Wikipedia: Penutian Languages