bahasa Indonesian

Indonesian (Bahasa Indonesia) is the official language of Indonesia. It is a standardized register of Malay, an Austronesian language which has been used as a lingua franca in the Indonesian archipelago for centuries.
Indonesia is the fourth most populous nation in the world. Of its large population, the number of people who speak Indonesian fluently is fast approaching 100%, making Indonesian, and thus Malay, one of the most widely spoken languages in the world.^[2]
Most Indonesians, aside from speaking the national language, are often fluent in another regional language (examples include Javanese, Sundanese and Madurese) which are commonly used at home and within the local community. Most formal education, as well as nearly all national media and other forms of communication, are conducted in Indonesian. In East Timor, which was an Indonesian province from 1975 to 1999, Indonesian is recognised by the constitution as one of the two working languages (the other being English), alongside the official languages of Tetum and Portuguese.
The Indonesian name for the language is Bahasa Indonesia (literally "the language of Indonesia"). This term is occasionally found in English. Indonesian is sometimes called "Bahasa" by English speakers, though this literally just means "language".

Speakers and geographic distribution

Map of where Indonesian is predominantly spoken. Dark blue: as a majority language. Light blue: as a minority language.

Indonesian has 23 million native speakers. Around 140,000,000 speakers use it as a second language^[3] alongside their local mother tongue. It is used extensively as a first language by Indonesians in urban areas, and as a second language by those residing in more rural parts of Indonesia.
The VOA and BBC use Indonesian as their standard for broadcasting in Malay.^[4][5] Indonesian is 80% cognate with Malaysian.^[3] In Australia, Indonesian is one of three Asian target languages, together with Japanese and Mandarin, taught in some of schools as part of the Languages Other Than English programme.^[6]