there are no new speakers, adults or children."

UNESCO operates with four levels of language endangerment between "safe" (not endangered) and "extinct" (no living speakers), based on intergenerational transfer: "vulnerable" (not spoken by children outside the home), "definitely endangered" (children no longer learning the language), "severely endangered" (only spoken by older generations), and "critically endangered" (youngest speakers are grandparents and older, often semi-speakers). UNESCO's Atlas of the World's Languages in Danger