The range of topics includes the areas of first and second language acquisition; sociolinguistic variation and awareness; language use and choice; family language policies; language attitudes and perception; modelling children’s and adolescents’ language in World Englishes; the role of child language acquisition in processes of language change; as well as methodologies of eliciting speech and writing from children and adolescents. The book combines qualitative and quantitative approaches and draws on psycholinguistic, corpus-linguistic, and ethnographic methodologies. What unites the contributions to the volume is that they all address the theoretical implications that a joint approach between World Englishes, sociolinguistics, and language acquisition has, i.e. why it is fruitful and how it can contribute to a deeper understanding of the different research paradigms.