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 Melayu Malaysia (“Malaysian Malay”) or also Bahasa Melayu (“Malay language”). In Singapore and Brunei, it is called Bahasa Melayu (“Malay language”). In Indonesia, an autonomous normative variety called Bahasa Indonesia (“Indonesian language”) is designated the bahasa persatuan/pemersatu (“unifying language” or lingua franca).
In addition to being the official language in Brunei, Indonesia, Malaysia, and Singapore, Malay is also spoken in East Timor and parts of the Philippines and Thailand. The total number of speakers of this language is around 300 million, making it the most spoken language in Southeast Asia.
Malay is now written using the Latin script, known as Rumi in Brunei, Malaysia and Singapore or Latin in Indonesia, although an Arabic script called Arab Melayu or Jawi also exists. Latin script is official in Malaysia, Singapore, and Indonesia. Malay uses Hindu-Arabic numerals.
Rumi (Latin) and Jawi are co-official in Brunei only. Names of institutions and organisations have to use Jawi and Rumi (Latin) scripts. Jawi is used fully in schools, especially the religious school, sekolah agama, which is compulsory during the afternoon for Muslim students aged from around 6–7 up to 12–14.
According to Wikipedia