In an increasingly interconnected world, English Language Teaching (ELT) serves as an essential tool for communication, collaboration, and innovation, transcending cultural and geographical boundaries. As a lingua franca, English unlocks access to education, employment, and international discourse, making it indispensable for personal empowerment and societal progress. This global demand for English proficiency underscores the urgency of aligning ELT with sustainability, a pressing concern amid environmental, social, and economic challenges. The United Nations’ Sustainable Development Goal 4 (Quality Education) calls for inclusive, equitable education that fosters lifelong learning and sustainable development, positioning ELT as a key player in preparing learners for a future where adaptability and critical thinking are essential.