Language convergence refers to the process in which two or more languages come into contact and begin to share features, such as vocabulary, grammar, and pronunciation.

Compound Bilingualism is not a recognized type of multilingualism. Simultaneous Bilingualism refers to the acquisition of two languages from birth, Sequential Bilingualism refers to the acquisition of a second language after the first language has been established, and Additive Bilingualism refers to the acquisition of a second language without losing the first language.

Language Acquisition refers to the process of learning a second language, typically through natural exposure and use, rather than formal instruction.

Language Proficiency is not a factor that influences language acquisition, but rather a result of it. Age, Motivation, and Social Context are all factors that can influence the process of language acquisition.

Bilingualism refers to the ability to use two languages effectively and appropriately, while Multilingualism refers to the ability to use three or more languages.

While multilingualism has been linked to various cognitive benefits, there is no conclusive evidence that it reduces the risk of dementia.

Language Attrition refers to the process of losing one's native language while acquiring a second language, typically due to prolonged exposure to the second language.

English as a Second Language (ESL) Programs are typically designed for non-native English speakers to learn English, rather than promoting multilingualism.

Diglossia refers to the phenomenon of two languages coexisting in a single speech community, where each language is used in different social contexts and for different purposes.

Accent Acquisition is not a common challenge faced by multilingual learners, as accents are typically acquired naturally through exposure to the language.

Language Death refers to the process of a language becoming extinct, typically due to the loss of native speakers.

Technological Advancements are not typically considered a factor that contributes to language death.

Language Spread refers to the process of a language spreading to new areas and becoming widely spoken, typically due to factors such as colonization, trade, or migration.

Language Revitalization is not a common consequence of language spread, but rather an effort to revive and restore a language that is facing extinction.

Language Revitalization refers to the process of reviving and restoring a language that is facing extinction, typically through efforts to promote its use and transmission to younger generations.