Malay (/məˈleɪ/; Malay: Bahasa Melayu, بهاس ملايو) is an Austronesian language spoken in Brunei, Indonesia, Malaysia and Singapore, as well as parts of Thailand. A language of the Malays, it is spoken by 290 million people across the Strait of Malacca, including the coasts of the Malay Peninsula of Malaysia and the eastern coast of Sumatra in Indonesia and has been established as a native language of part of western coastal Sarawak and West Kalimantan in Borneo. It is also used as a trading language in the southern Philippines, including the southern parts of the Zamboanga Peninsula, the Sulu Archipelago and the southern predominantly Muslim-inhabited municipalities of Bataraza and Balabac in Palawan.
As the Bahasa Kebangsaan or Bahasa Nasional ("national language") of several states, Standard Malay has various official names. In Malaysia, it is designated as either Bahasa Malaysia ("Malaysian language") or Bahasa Melayu ("Malay language"). In Singapore and Brunei, it is called Bahasa Melayu ("Malay language") and in Indonesia, an autonomous normative variety called Bahasa Indonesia ("Indonesian language") is designated the Bahasa Persatuan/Pemersatu ("unifying language"/lingua franca). However, in areas of central to southern Sumatra where vernacular varieties of Malay are indigenous, Indonesians refer to it as Bahasa Melayu and consider it one of their regional languages.
Standard Malay, also called Court Malay, was the literary standard of the pre-colonial Malacca and Johor Sultanates, and so the language is sometimes called Malacca, Johor or Riau Malay (or various combinations of those names) to distinguish it from the various other Malayan languages. According to Ethnologue 16, several of the Malayan varieties they currently list as separate languages, including the Orang Asli varieties of Peninsular Malay, are so closely related to standard Malay that they may prove to be dialects. There are also several Malay trade and creole languages which are based on a lingua franca derived from Classical Malay as well as Macassar Malay, which appears to be a mixed language.
(Courtesy of Malay Language Wikipedia)