The indigenous languages of Malaysia belong to the Mon-Khmer and Malayo-Polynesian families. The national, or official, language is Malay which is the mother tongue of the majority Malay ethnic group. The main ethnic groups within Malaysia are the Malay people, Han Chinese people and Tamil people, with many other ethnic groups represented in smaller numbers, each with its own languages. The largest native languages spoken in East Malaysia are the Iban, Dusunic, and Kadazan languages. English is widely understood and spoken within the urban areas of the country; the English language is a compulsory subject in primary and secondary education. It is also the main medium of instruction within most private colleges and private universities. English may take precedence over Malay in certain official contexts as provided for by the National Language Act, especially in the states of Sabah and Sarawak, where it may be the official working language. Furthermore, the law of Malaysia is commonly taught and read in English, as the unwritten laws of Malaysia continue to be partially derived from pre-1957 English common law, which is a legacy of past British colonisation of the constituents forming Malaysia. In addition, authoritative versions of constitutional law and statutory law are continuously available in both Malay and English.

Malaysian Malay, also known as Standard Malay, Bahasa Malaysia, or simply Malay, is a standardized form of the Malay language used in Malaysia and also used in Brunei and Singapore. Malaysian Malay is standardized from the Johore-Riau dialect of Malay. It is spoken by much of the Malaysian population, although most learn a vernacular form of Malay or another native language first. Malay is a compulsory subject in primary and secondary schools.