Road signs in Indonesia the rules are not being implemented properly. Indonesian road signs use Indonesian, the official and the national language of Indonesia. However, English is also used for important public places such as tourist attractions and airports. Bilingual signs can be found in tourist areas such as Bali. Indonesia signed the Vienna Convention on Road Signs and Signals but have yet to ratify the Convention. Warning signs warn of possible dangers or unusual conditions ahead and alert motorists on the hazards to expect. Warning signs in Indonesia used to closely follow The American MUTCD and Japanese diamond-shaped with yellow background and black-and-yellow
Demographics of Indonesia Indonesia is the world's most populous Muslim-majority nation; almost 87.18% of Indonesians declared themselves Muslim in the 2010 census. 9.87% of the population adhered to Christianity (of which more than 70% were Protestant), 1.69% were Hindu, 0.72% Buddhist, and 0.56 of other faiths. Most Indonesian Hindus are Balinese and most Buddhists in modern-day Indonesia are Tionghoa. Indonesian is the official language but there are many different languages native to Indonesia. According to Ethnologue, there are currently 737 living languages spoken in Indonesia, the most widely spoken being Javanese. A number of Chinese varieties, most prominently Min Nan, are also spoken.