Of the roughly 7,000 languages spoken today, linguists estimate that as many as half may by the end of this century. Most are spoken by small communities, and many have never been written down. When the last fluent speaker of such a language dies, an entire system of sound, grammar and meaning vanishes with them, often leaving .
The causes are rarely sudden. Languages typically decline through a gradual process known as , in which a community abandons its in favour of a more dominant one. Parents, perceiving that economic opportunity lies in the national or global language, may stop their own to their children. Within two or three generations, the language may be the elderly and to ritual occasions.
Why should this matter to anyone beyond the communities concerned? Advocates offer several answers. Languages accumulated knowledge — about local plants, medicines, weather patterns and ecosystems — that may not survive translation. Each also represents a distinct experiment in how human cognition can structure the world, of immense value to linguists seeking to understand the limits of grammar. And for speakers themselves, language is bound up with identity, memory and dignity.
is but not impossible. The most celebrated example is Hebrew, revived as an everyday spoken language in the late nineteenth and early twentieth centuries after centuries of mainly use. More recently, Welsh and Māori have experienced notable , sustained by , broadcasting and supportive public policy. These cases suggest that the fate of a language is not sealed by impersonal forces alone; it depends, ultimately, on whether a community — and the society around it — deems it worth speaking.