问答题 It is common to use the term "evolution" to describe the changes to everything from football teams to presidencies. But when academics describe the evolution of languages, they literally mean that languages parent distinct offshoots, compete for usage, and die out like biological organisms. For this reason, UNESCO maintains an atlas of endangered and extinct languages that uses a classification system similar to that behind the Endangered Species List. Researchers generally measure the vulnerability of languages to extinction by metrics such as the number of native speakers. In a new research paper, "Digital Language Death, " mathematical linguist András Kornai asks what languages are endangered online and in usage on electronic devices.无