Grammatical gender
Grammatical gender is found in many Indo-European languages (including Spanish, French, Russian, and German—but not English, Bengali, Armenian or Persian, for example), Afroasiatic languages (which includes the Semitic and Berber languages, etc.), and in other language families such as Dravidian and Northeast Caucasian, as well as several Australian Aboriginal languages such as Dyirbal, and Kalaw Lagaw Ya. Most Niger–Congo languages also have extensive systems of noun classes, which can be grouped into several grammatical genders.