Information from: “Atlas of the World’s Languages in Danger” . Christopher Moseley (ed.) (2010) UNESCO Publishing
20 percent certain, based on the evidence available
"Rough estimate based on various sources; 3,814 in Spain according to 1991 linguistic census"
Spoken in the departments of Landes, Gers, and Hautes-Pyrénées, the eastern parts of Pyrénées-Atlantiques, the western parts of Haute-Garonne and Ariège, and the southern and western parts of Gironde, France; the Aran Valley, northwestern Catalonia, Spain