This edited volume delves into the intricate relationships between multilingualism, inclusive education, and social justice. It presents a rich array of interdisciplinary studies that blend both theoretical and practical perspectives. The authors employ a mixed-methods approach to gather and analyze data from a diverse range of populations, including students, teachers, parents, and language policy experts across various educational levels. The book examines the dynamics of bilingual and multilingual classrooms, as well as Content and Language Integrated Learning (CLIL) environments, emphasizing the importance of linguistic and cultural diversity as valuable educational resources. It draws upon a variety of theoretical and practical approaches from applied linguistics, sociolinguistics, language policy, and education, all centered on the benefits of multilingualism, inclusive education, and social justice. The work explores the complexities of multilingualism and multiculturalism and their connections to inclusive education and social justice across different geographic regions and educational settings. It adopts a dual approach, examining both theoretical frameworks and practical realities, by incorporating the voices and perspectives of multiple stakeholders. This diverse range of viewpoints sheds light on the roles of family and school involvement in promoting multilingual education, inclusive practices, and social justice.