Pluralistic ignorance
In social psychology, pluralistic ignorance is a situation in which a majority of group members privately reject a norm, but go along with it because they incorrectly assume that most others accept it. This is also described as "no one believes, but everyone thinks that everyone believes". In short, pluralistic ignorance is a bias about a social group, held by the members of that social group.
Plurilingualism
Plurilingualism is a situation wherein a person who has competence in more than one language can switch between languages – from one language to another and vice versa – according to the circumstances at hand for the purpose of coping with a social matter. There is a distinction between plurilingualism and multilingualism. Multilingualism, on the other hand, is connected to situations wherein multiple languages exist side-by-side in a society but are utilized separately. Plurilingualism is derived from bilingualism. A consequence of plurilingualism is pluricultural competence. In general, persons who are identified as plurilinguals had contact with so-called 'foreign' languages through educational institutions, however the education system plays only a small role in the linguistic competence of these individuals.