Language Extinction: https://www.sbs.com.au/nitv/my-grandmothers-lingo/article/2016/10/06/what-language-extinction-and-why-should-we-care
A language becomes extinct when its last native speaker dies, and it’s usually the result of its speakers shifting to a lingua franca like English, Arabic or Spanish. This implies choice, but it’s often a history of marginalisation that leads to the change.