Is language extinction sudden or gradual?
Both. The fate of a language can be changed in a single generation if it is no longer being learned by children. This has been true for some Yupik Eskimo communities in Alaska, where just 20 years ago all of the children spoke Yupik; today the youngest speakers of Yupik in some of these communities are in their 20s, and the children speak only English. Likewise, Scots Gaelic was spoken on Cape Breton Island, Nova Scotia, until the 1940s, but by the 1970s the language was no longer being learned by children. In other cases, languages have declined much more slowly. Iroquoian languages like Onondaga and Mohawk, spoken in upstate New York and adjacent parts of Canada, have been declining for over two centuries; yet they are still spoken today by older adults and, in the case of Mohawk, some younger people as well.