English is often understood, especially in tourist areas, but is not universal. In Indonesia, Bahasa is the official language, with Dutch and Arabic also being widely understood. (This is the country with the world’s largest Muslim population.) In Sri Lanka, the official languages are Tamil and Sinhala, and in the Maldives the official language is Dhivehi, which is closely related to Sinhala. In Thailand, the official language is Thai, but English is accepted as an unofficial second language throughout the country.