The book is of interest to scholars of multilingualism, language teachers, researchers, and administrators who are developing policies on teaching English and promoting multilingualism. Given its scope, this edited collection provides an overview of how multilingualism is transforming the practice of Teaching English to Speakers of Other Languages (TESOL) in diverse contexts around the world. It serves as a platform for discussions related to policy enactment where TESOL and multilingualism are viewed as collaborative endeavours and approaches the topic from three different angles. The first section of the book provides critical examinations of previous initiatives and accomplishments in the area of language policy development and implementation. The second section describes current projects and initiatives intended to expand and strengthen the field of TESOL while providing space for local and indigenous languages to develop. The third and last part of the book highlights policy development areas that need special consideration in order to develop a form of TESOL that builds on and contributes to multilingualism.