Grammatical sex is found in many Indo-European languages (including Spanish, French, Russian and German – but not, for example, in English or Persian), in Afro-Asian languages (including Semitic and Berber languages, etc.) and in other families such as Dravidian and Northeast Caucasus, as well as in several Australian Aboriginal languages such as Dyirbal and Kalaw Lagaw Ya. Most Niger-Congo languages also have extensive noun class systems, which can be grouped into several grammatical sexes. In contrast, grammaticolic sex is lacking in Korean, Japanese, Tunisian, Turkish, Mongolian, Austronesian, Sino-Tibetan, Hearing and most Native American-speaking families.  Modern English uses gender in generally marked pronouns for natural sex, but a system of inter-knowledge in substantive phrase is missing, which is one of the central elements of grammatical sex in most other Indo-European languages.  Schiller, N.O. (2013). “Psycholinguistic approaches to the investigation of grammatical gender in speech production: an overview and new data,” in The Expression of Gender, ed. G.C Corbett (New York, NY: Gruyter Sheep), 161-190. There are some traces of sexual marking in modern English: in English, the problem of gender determination does not arise in the plural, because sex in that language is reflected only in pronouns, and the plural pronoun that they have no gender forms. However, in the singular, the problem often arises when it is referred to a person with unspecified or unknown genders. In this case, it was traditional to use the masculine, but other solutions are now often preferred – see the neutral language of sex and the singular. Some gender differences are called classes; You`ll find some examples in the Noun class. In some Slavic languages, for example among the male and sometimes female and castrated genres, there is another separation between the animated and the inanimate — and in Polish, sometimes also between the subtantives, which refer to men and non-humans.
(The details are below.) There is also a non-interpersonal (or “rational-non-rational”) distinction in Dravidian languages. (see below) Some other examples of the phenomena mentioned above are listed below. (These come mainly from Slavic languages, where sex is largely correlated at the end of the name. The reservations of this research are the possibility for subjects to “use grammatical sex as a strategy to accomplish the task” and the fact that even for inanimate objects, the sex of the substants is not always fortuitous.