Although there is now a substantial body of literature exploring the effects of language diversity in international management contexts, little attention has been paid to the ethical dimensions of language diversity at work. This conceptual paper draws on the concept of epistemic injustice in order to explore how language, and in particular corporate language policies, may act as a source of epistemic injustice within the workplace. It demonstrates how language competence affects credibility judgements about a speaker, and also considers how (...) corporate language policies can create situations of hermeneutic injustice, in which marginalised groups are denied the vocabularies to understand their own experiences. Finally, ways in which such epistemic harms can be reduced are discussed, and the possibilities for management education to create epistemically responsible managers are highlighted. (shrink)