Multilingualism, both in individuals and in societies, is interesting both from a linguistic and psychological viewpoint and of ever-present political importance. The extent of migration and immigration in the modern world is making multilingualism, both individual and social, increasingly common and of major impact, in politics and particularly in education, all over the world. This book covers all aspects of the subject, from the psychological impact on a child of being raised bilingual, to the political struggles to preserve - or suppress - minority languages and the relationship between nationalistic feeling and language.