Language constitutes one of the many systems of knowledge that man has acquired during his existence. Unlike traditional conceptions that see language as a phenomenon related to community, we can say that the language has an individual way, which is not only related to its performative displays, but also to its integral competence of special speakers. If nearly two centuries ago, the situations of bilingualism were viewed with suspicion and as temporary existence, now they are seen as the densest forms of linguistic and ethnic contacts. At this point, to a large extent of individuals, the monolingual situation is slowly being replaced by the bi- or multilingualism, as a result of various causes. If we drew a comparison between the monolingu...