The lingua franca status of English in transcultural settings questions the orthodox pedagogical principles and mainstream approaches of English language teaching. To mirror the relationship between English as a subject matter and English as a globalised sociolinguistic phenomenon, some scholars call for revisiting the conventional approaches of pedagogy. Still, the response to the call for a transition from the monocentric methods of English language teaching is slow. Teachers have multiple concerns about how to incorporate a global dimension into a general English language course for undergraduates. The present study aims to address this gap by offering a practical example of how to address English as a lingua franca phenomenon in a general English language course. The study showcases classroom practices for raising awareness of today’s complexity of English use as a worldwide lingua franca. Ten Saudi undergraduates at a Saudi university participated in the study. The study shares the participants’ critical reflections on what they have learned from the course. Analysis of the participants’ reflections reveal that approaches based on complexity theory increased their familiarity with English linguistic diversities, developed their transcultural awareness and improved their ability to cope with English functional and contextual diversities. It is hoped that this showcase study can provide some guidance for the further implementation of a global dimension in other contexts.