"Language as a medium represents and transports gender binarity. The gender relationship is constructed through the perception of (gender) perception" (Luhmann 1997: 207).
Our daily language shows an absence of people who live in non-binary systems, or who identify themselves as non-binary and thus fall out of the category of the so-called "normal".
They cannot or do not want to meet the requirements of heteronormativity. Heteronormative language produces and fixes injustice. It standardizes behaviour and social expectations in relation to heterosexuality and belonging to a strict gender binary. And this necessarily implies oppression.