This edited volume explores multilingualism, multiculturalism, and English language education across diverse global contexts, from the Global South to the Global North. It presents interdisciplinary research on language policy, multilingual awareness, and English-medium instruction, highlighting perspectives from teachers, students, parents, and administrators. The chapters critically examine culturally responsive teaching, inclusive practices, and teacher education programs that support immigrant, refugee, and minority language students. Topics include community-based curricula, multilingual activities, indigenous language revitalization, and sociocultural processes shaped by globalization and language ideologies. Drawing on research from Cyprus, Austria, Slovenia, the USA, India, Italy, Japan, and Canada, the volume employs varied methodological approaches to address the challenges and opportunities of multilingual classrooms. It is an essential resource for educators, researchers, and policymakers committed to fostering linguistic diversity and equity in education.