There are an estimated 700 languages used in Indonesia, most of which are Austronesian languages. The de jure official language in Indonesia is the Indonesian language as indicated in the Indonesian Constitution. The language is the most widely used language in the country and is used in all formal communication particularly in media, administration, and commerce. However, there are the other main languages used in the country such as Javanese and Sundanese which have millions of native speakers.
For more information on what languages are spoken in Indonesia visit worldatlas.com.