Why is Newar considered a caste not a community or a civilization?

Newar Definition & Meaning - Merriam-Webster newar Ritual and economic relationships have be built up beyond the confines of the settlement The Newar caste system, the individual castes, and the types of newar nepal Dear Questioner, Newar is just not a caste It is a word which represents a community of people who share the same language [ Nepal

newar Newar or Nepami, are primarily inhabitants in Nepal's Kathmandu Valley and its surrounding areas and the creators of its historic heritage and civilisation