The description of bilingualism

Bilingualism is not a phenomenon of language; it is a characteristic of its use. It is not a feature of the code but of the message. It does not belong to the domain of “langue” but of “parole.” If language is the property of the group, bilingualism is the property of the individual. An individual’s use of two languages supposes the existence of two different language communities; it does not suppose the existence of a bilingual community. The bilingual community can only be regarded as a dependent collection of individuals who have reasons for being bilingual. A self-sufficient bilingual community has no reason to remain bilingual, since a closed community in which everyone is fluent in two languages could get along just as well with one language. As long as there are different monolingual communities, however, there is likelihood of contact between them; this contact results in bilingualism.