Internationally operating business professionals communicate using English as a business lingua franca (BELF), which differs from “standard” English usage, leading to calls for innovations in business English (BE) pedagogy. However, how BE instructors incorporate BELF research findings in the classroom remains unexplored. Therefore, in this mixed methods explanatory sequential study, we used a questionnaire and semistructured interviews to collect data from BE instructors who had been exposed to BELF research. The findings revealed that while the exposure to BELF raised their awareness and understanding, there remain contextual, theoretical, and mindset-based obstacles to implementing BELF principles in the classroom.