TY - BOOK AU - Lightfoot,David TI - How new languages emerge SN - 0521676290 PY - 2006/// CY - New York PB - Cambridge University Press KW - Language acquisition KW - Language and languages KW - Variation KW - Linguistic change N1 - Includes bibliographical references and index; 1. Internal languages and the outside world -- 2. Traditional language change -- 3. Some properties of language organs -- 4. Languages emerging in children -- 5. New E-language cuing new I-languages -- 6. Use and variation of grammars -- 7. The eruption of new grammars -- 8. A new historical linguistics ER -