The Malay language, or Bahasa Melayu, is an Austronesian language spoken in Brunei, Indonesia, Malaysia and Singapore, as well as parts of Southern 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.