Gendered language does not refer to the masculine or feminine labels given to nouns, instead it is an language that carries a bias towards a specific sex or gender.
The dominance theory is the idea that the language men use is superior and holds more dominance in society, whereas the language women use is seen as inferior.
The deficit theory is the idea that the language men use is seen as the standard, whereas the language women use differs from the standard and is seen as insufficient.
The diversity theory argues that there is a difference between sex and gender, it also suggests that the sex we are assigned at birth does not affect the language we use.
‘verbal hygiene’ is refer to the ways in which people think they are supposed to speak in order to fit into the norm and meet the expectations of a correct society.