Outside Flores, there was once a small minority of Manggarai-speaking people in the village of Manggarai located in the eastern part of Jakarta, the capital city of Indonesia. Formerly a neighbourhood in the capital with a large concentration of transmigrant workers from the Greater Manggarai region of Nusa Tenggara Timur, the neighbourhood's populace today from the said area has been decreasing (due to factors such as return to their ancestral village, intermarriage with different ethnic groups, etc.) for it is now populated by the majority native Betawi ethnic group.
The Manggarai language is part of the Austronesian family, and is therefore related to Indonesian and other Malay varieties. Most speakers of Manggarai also speak Indonesian for official and commercial purposes and to communicate with non-Manggarai Indonesians (including citizens of the same province from different diverse ethnic groups). Riung is often considered a dialect of Maranggai or a separate language.
^This data include statistics for the population of the Regency of Greater Manggarai on Flores island, which consists of three districts: Manggarai district, West Manggarai district, and East Manggarai district.
Verheijen, J. A. J.; Grimes, C. E. (1995). "Manggarai". In Tryon, D.T. (ed.). Comparative Austronesian Dictionary: An Introduction to Austroneasian Studies. Berlin: Mouton de Gruyter. pp. 585–592.