Newar or Newari and known officially in Nepal as Nepal Bhasa, is a Sino-Tibetan language spoken by the Newar people, the indigenous inhabitants of Nepal Mandala, which consists of the Kathmandu Valley and surrounding regions in Nepal. "Nepal Bhasa" literally means "Nepalese language", however the language is not the same as Nepali. The two languages belong to different language families (Sino-Tibetan and Indo-European, respectively), but centuries of contact have resulted in a significant body of shared vocabulary. Newar was Nepal's administrative language from the 14th to the late 18th century. From the early 20th century until democratisation, Newar suffered from official suppression. From 1952 to 1991, the percentage of Newar speakers in the Kathmandu Valley dropped from 75% to 44% and today Newar culture and language are under threat. The language has been listed as being "definitely endangered" by UNESCO.