Bahasa Malaysia and Bahasa Indonesian are two varieties of the Malay language (Bahasa Melayu). For the most part they are part mutually intelligible, but differ in some spelling, pronunciation, and vocabulary. The two varieties are spoken across Indonesia, Malaysia and southern Thailand by more than 265 million speakers, making it is the sixth most widely spoken language in the world. The writing systems of Bahasa Malaysia and Bahasa Indonesian use the Roman alphabet.
Bahasa Malaysia is the national and official language of Malaysia, spoken by 24 million native speakers.
Bahasa Indonesia is based on the Malay trade dialect, and is the national language of the Republic of Indonesia. It the lingua franca of the Indonesian islands, uniting the 240 million people of Indonesia, whose native tongue may be one of the over 300 distinct languages or regional dialects.