Of the various dialects of Malay, the most important is that of the southern Malay Peninsula, the basis of standard Malay and of the official language of the Republic of Indonesia, Bahasa Indonesia, or Indonesian.
A Malay pidgin called Bazaar Malay (melayu pasar, "market Malay") was widely used as a lingua franca in the East Indian archipelago and was the basis of the colonial language used in Indonesia by the Dutch.
The version of Bazaar Malay used in Chinese merchant communities in Malaysia is called Baba Malay.
Languages or dialects closely related to Malay that are spoken on Borneo include Iban (Sea Dayak), Brunei Malay, Sambas Malay, Kutai Malay, and Banjarese.