This book offers essential insights into the challenges and complexities surrounding the medium of instruction (MOI), its impact on all languages and stakeholders in multilingual contexts, educational processes, developments and outcomes.

Chapter 1. Medium of instruction and Multilingual contexts: Unravelling the questions and unpacking the challenges (Indika Liyanage).- Chapter 2. Language alternation as an interactional practice in the foreign language classroom (Anna Filipi).- Chapter 3. Multilingualism and language mixing among Singapore university students (Kingsley Bolton).- Chapter 4. Educational globalization and the creation of split identities (Francois Victor Tochon).- Chapter 5. Bilingual Education classrooms in Sri Lankan schools: A social space for ethnolinguistic reconciliation (Harsha Wijesekera).- Chapter 6. CLIL for who? Commodification of English-medium courses in Japan's higher education (Kayoko Hashimoto).- Chapter 7. Benefits of translanguaging and transculturation exchanges between international higher degree research students and English medium research supervisors (Minglin Li).- Chapter 8. Trilingualism and Medium of Instruction Models in Minority Schools in Qinghai Province, China (Ma, Fu).- Chapter 9. Children's views and strategies for making friends in linguistically diverse English medium instruction settings (Maryanne Theobald).- Chapter 10. English in a Mongolian Ethnic Minority Primary School (Yi Yayuan).- Chapter 11. Scrutinising Critical Thinking (CT) in Chinese Higher Education: Perceptions of Chinese Academics (Anhui Wang).- Chapter 12. Media of instruction in Indonesia: Implications for bi/multilingual education (Tony Walker).