Lists of endangered languages are mainly based on the definitions used by UNESCO.In order to be listed, a language must be classified as "endangered" in a cited academic source. Researchers have concluded that in less than one hundred years, almost half of the languages known today will be lost forever. The lists are organized by region.

Lists of endangered languages; List of languages by time of extinction; List of revived languages; The Red Book of the Peoples of the Russian Empire This page was last edited on 27 May 2022, at 20:10 (UTC). Text is available under the Creative Commons Attribution-ShareAlike License …