Maria Garraffa is Associate Professor in Psycholinguistics and Honorary Fellow of Bilingualism Matters. Her research has contributed to the promotion of language learning across the lifespan. Antonella Sorace is Professor of Developmental Linguistics at the University of Edinburgh. She is the founding director of the organization Bilingualism Matters, which has branches all over the world. Maria Vender is Assistant Professor in Educational Linguistics ​​at the University of Verona. Her research interests cover the domains of language acquisition and processing in typical, atypical and bilingual contexts. John W. Schwieter is Professor of Spanish and Linguistics at Wilfrid Laurier University. Recent publications include Second Language Acquisition Theory (2022) and The Cambridge Handbook of Working Memory and Language (2022).

'Garraffa, Sorace and Vender provide a lucid and comprehensive introduction to the fascinating topic of bilingualism. The lifespan approach highlights the relevance and significance of bilingualism to individuals and society. Schwieter has done a great service to us all by translating and adapting the book into English, making it accessible to many more readers across the world.' Li Wei, Director and Dean, University College London, Institute of Education

• 1. Who is bilingual?; 2. The development of two languages: phonology, lexicon, and morphosyntax; 3. Bilingualism across the lifespan; 4. Two languages in one brain; 5. Bilingualism and atypical development; 6. Bilingualism and society; Glossary.

Maria Garraffa is Associate Professor in Psycholinguistics and Honorary Fellow of Bilingualism Matters. Her research has contributed to the promotion of language learning across the lifespan. Antonella Sorace is Professor of Developmental Linguistics at the University of Edinburgh. She is the founding director of the organization Bilingualism Matters, which has branches all over the world. Maria Vender is Assistant Professor in Educational Linguistics ​​at the University of Verona. Her research interests cover the domains of language acquisition and processing in typical, atypical and bilingual contexts. John W. Schwieter is Professor of Spanish and Linguistics at Wilfrid Laurier University. Recent publications include Second Language Acquisition Theory (2022) and The Cambridge Handbook of Working Memory and Language (2022).

'Garraffa, Sorace and Vender provide a lucid and comprehensive introduction to the fascinating topic of bilingualism. The lifespan approach highlights the relevance and significance of bilingualism to individuals and society. Schwieter has done a great service to us all by translating and adapting the book into English, making it accessible to many more readers across the world.' Li Wei, Director and Dean, University College London, Institute of Education

• 1. Who is bilingual?; 2. The development of two languages: phonology, lexicon, and morphosyntax; 3. Bilingualism across the lifespan; 4. Two languages in one brain; 5. Bilingualism and atypical development; 6. Bilingualism and society; Glossary.

Maria Garraffa is Associate Professor in Psycholinguistics and Honorary Fellow of Bilingualism Matters. Her research has contributed to the promotion of language learning across the lifespan. Antonella Sorace is Professor of Developmental Linguistics at the University of Edinburgh. She is the founding director of the organization Bilingualism Matters, which has branches all over the world. Maria Vender is Assistant Professor in Educational Linguistics ​​at the University of Verona. Her research interests cover the domains of language acquisition and processing in typical, atypical and bilingual contexts. John W. Schwieter is Professor of Spanish and Linguistics at Wilfrid Laurier University. Recent publications include Second Language Acquisition Theory (2022) and The Cambridge Handbook of Working Memory and Language (2022).

'Garraffa, Sorace and Vender provide a lucid and comprehensive introduction to the fascinating topic of bilingualism. The lifespan approach highlights the relevance and significance of bilingualism to individuals and society. Schwieter has done a great service to us all by translating and adapting the book into English, making it accessible to many more readers across the world.' Li Wei, Director and Dean, University College London, Institute of Education

• 1. Who is bilingual?; 2. The development of two languages: phonology, lexicon, and morphosyntax; 3. Bilingualism across the lifespan; 4. Two languages in one brain; 5. Bilingualism and atypical development; 6. Bilingualism and society; Glossary.