Current research on multilingual acquisition is concerned with whether children exposed to multiple languages from birth build separate language systems from early on or a single system comprised of elements of all languages. While several studies have shown that developing bilinguals show signs of language differentiation from the onset of speech, very little work has been done on children learning more than two languages. This book examines the emergence of three languages - Tagalog, Spanish, and English - in a child raised in a trilingual environment and focuses on the process of language...