Nepal Bhasa, the mother-tongue of the Newars, is widely used and spoken in and around Kathmandu Valley and in major Newar trade towns across Nepal.
Other languages, particularly in the Inner Terai hill and mountain regions, are remnants of the country's pre-unification history of dozens of political entities isolated by mountains and gorges.
Children who spoke Nepali natively and who were exposed to Sanskrit had much better chances of passing the national examinations at the end of high school, which meant they had better employment prospects and could continue into higher education.
Children who natively spoke local languages of the Madhesh and Hills, or Tibetan dialects prevailing in the high mountains were at a considerable disadvantage.
These languages typically are limited to an area spanning about one day's walk.