High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Sinhala and also known as Helabasa is the native language of the island Sri Lanka, and the language of the Sinhalese, who make up the largest ethnic group of Sri Lanka. It belongs to the Indo-Aryan branch of the Indo-European languages. Sinhala is the mother tongue of about the 15 million Sinhalese totalling about 19 million, and is spoken by other groups in Sri Lanka as a second language.