Frontmatter -- Acknowledgements -- Contents -- Setting the scene: Informal language learning and socialization in additional languages -- Part I: Informal language learning in private contexts -- The impact of family and media on L2 development in early childhood in a multilingual society: The case of the Seychelles -- ELF and other languages in the family: Portraying multilingual repertoires at dinner tables across Europe -- Dynamic language repertoires: The case of an Italian-Turkish couple in Istanbul -- A multimodal perspective on communicative competence in multilingual Afro-Surinamese speaker communities -- Part II: Informal language learning in public contexts -- Communicative competence in the virtual breathing space: Minoritized language learning in social media -- Researching the benefits of integrating language and museum education on students' linguistic, cognitive, affective, and intercultural development -- Bringing the outside in: Attitudes towards multilingual competence in Zambia and Tanzania -- Student teachers' attitudes toward translanguaging in formal learning vis-à-vis informal interaction: A survey of a university in Kenya -- About the contributors -- Index of subjects