Gender and class grouping systems categorize nouns in languages. Some languages have natural gender systems like English that group nouns as masculine, feminine or neutral. Dyirbal, an Australian Aboriginal language, has a more complex 4 class noun system. The class a noun belongs to determines the pronoun used to refer to it. Traditionally, Class 1 was for male things, Class 2 for dangerous females and items, Class 3 for edible plants, and Class 4 for inanimate objects. Younger speakers of Dyirbal now have a simplified 2 class system of male versus everything else.