Based on linguistic anthropological research conducted among British interfaith dialogue advocates, this article analyzes the changing value of “diversity talk” in the UK, highlighting new understandings of global religion as a source of communication anxiety. Paradoxically, British interfaith dialogue advocates promote Taylorist linguistic prescriptions for religious diversity management across the globe, yet flout the social stratification inherent in managerial logic. I analyze these globally shared techniques, revealing advocates' desire to upscale linguistic prescriptions from the vertical authority of clergy, local and state politicians to what they see as the highest scale: the global ecumene.