Part I 1. Introduction 2. Theoretical and methodological framework Part II: Multilingualism within and across languages 3. What is a language? 4. Language variation and the spread of global languages 5. Revitalization of endangered languages Part III: Societal and individual multilingualism 6. Societal multilingualism 7. Language and identities 8. The interplay between individual and societal multilingualism Part IV: Multilingual education 9. Flexible vs fixed multilingualism 10. Mother tongue education or literacy bridges? 11. Heritage language education Part V: Critical analysis of discourses 12. Institutional discourses on language and migration 13. Media representations of multilingualism 14. Linguistic landscape Part VI: Conclusion Notes on the Activities Author Index Subject Index