The social implications of multilingualism is a field of study on whcih systematic research began only in the second half of the 20th century in Africa. This book, originally published in 1971, contains papers which concentrate on East Africa but it also discusses theoretical problems and methods arising from socio-linguistic studies outside the African field. These include studies on national languages and languages of wider communication in developing nations; the communication role of languages in multilingual societies; and social and cognitive aspects of bilingualism.