An endangered language or moribund language is a language that is at risk of disappearing as its speakers die out or shift to speaking other languages. Language loss occurs when the language has no more native speakers and becomes a "dead" or "extinct language". A dead language may still be studied through recordings or writings, but it is still considered dead or extinct once there are no more fluent speakers left. Although languages have always become extinct throughout human history, factors currently accelerating the rate of language death include globalization, mass migration, linguistic imperialism, neocolonialism, and linguicide.