People have some very entrenched and often unexamined beliefs about language, and these beliefs often underpin social injustices in language learning, teaching, and use. In this module we interrogate some of these myths from the perspective of Applied Linguistics, using my co-authored introduction to the field as a basis. We’ll also look at data from research I’ve been involved in on language teachers’ beliefs, both ontological and ideological, and dip into some theory I have developed about the different ways English is conceptualised.