Multilingualism

Multilingualism is the ability of an individual speaker or a community of speakers to communicate effectively in three or more languages. Contrast with monolingualism, the ability to use only one language.

A person who can speak multiple languages is known as a polyglot or a multilingual.

Multilingual speakers have acquired and maintained at least one language during childhood, the so-called first language (L1). The first language (sometimes also referred to as the mother tongue) is acquired without formal education, by mechanisms heavily disputed. Children acquiring two languages in this way are called simultaneous bilinguals. Even in the case of simultaneous bilinguals, one language usually dominates the other. People who know more than one language have been reported to be more adept at language learning compared to monolinguals. Additionally, bilinguals often have important economic advantages over monolingual individuals as bilingual people are able to carry out duties that monolinguals cannot, such as interacting with customers who only speak a minority language.

Multilingualism in computing can be considered part of a continuum between internationalization and localization. Due to the status of English in computing, software development nearly always uses it (but see also Non-English-based programming languages), so almost all commercial software is initially available in an English version, and multilingual versions, if any, may be produced as alternative options based on the English original.

Source : https://www.thoughtco.com/what-is-multilingualism-1691331
https://en.m.wikipedia.org/wiki/Multilingualism