This book examines the nature of human language and the ideology of linguistic legitimacy – the common set of beliefs about language differences that leads to the rejection of some language varieties and the valorization of others. It investigates a broad range of case studies of languages and dialects which have for various reasons been considered \u27low-status\u27 including: African American English, Spanglish, American Sign Language, Yiddish, Esperanto and other constructed languages, indigenous languages in post-colonial neo-European societies, and Afrikaans and related language issues in South Africa. Further, it discusses the implications of the ideology of linguistic legitimacy for the teaching and learning of foreign languages in t...