Information from: “Farvi Dialect” . Habib Borjian (2013)
20 percent certain, based on the evidence available
"Notwithstanding Farroḵi’s population that surpasses two thousands, its vernacular is moribund. During the decades of expansion of modern education and media, Farvi has been thinning, and its number of speakers shrinking, to the extent that Farvi should be considered an endangered language."
Farroḵi, a township in the sub-province of Ḵur o Biābānak on the edge of the Great Persian Desert