Language death is the process by which a language ceases to be spoken. It can occur for a variety of reasons, including assimilation, conquest, and migration.

Economic development can actually help to preserve languages by providing new opportunities for speakers to use their language.

Language evolution, language change, and language drift are all terms used to describe the process by which a language changes over time.

Sound change, grammatical change, lexical change, and semantic change are all types of language change.

Language borrowing is the process by which a language borrows words from another language.

Language death is not a type of language contact.

Language convergence is the process by which two or more languages become more similar over time.

Geographical proximity, cultural contact, economic integration, and political integration are all factors that can contribute to language convergence.

Language extinction is the process by which a language becomes extinct.

Economic development is not a consequence of language extinction.

Language revitalization, language renewal, and language restoration are all terms used to describe the process by which a language is revived.

Banning the use of other languages is not a strategy for language revitalization.

Language spread, language diffusion, and language globalization are all terms used to describe the process by which a language becomes a lingua franca.

Economic development is not a factor that can contribute to language spread.

Language dominance, language hegemony, and language imperialism are all terms used to describe the process by which a language becomes the dominant language in a region.