Vayu (वायु), Wayu or Hayu (हायु) is a Sino-Tibetan language spoken in Nepal by about 1,520 people in Bagmati Province. Dialects include Pali gau (पालि गाउ) Mudajor Sukajor Ramechhap Sindhuli and Marin Khola. The Vayu language features SOV ordering. There are strong Nepali influences in its phonology, lexicon, and grammar. Its writing system uses the Devanagari script. There are no known monolingual speakers of the language, as its speaking population also uses Nepali. Despite a lack of monolingual children, use of Vayu has survived into the 21st century

Phonology

Grammar

a-mʊ kɔ lɔm-nɔŋ kɔ nakpu xʷaptsɔ {dum –} kɛm-hɛ kɔlu xʷaptsɔ {nɔ […]} dzəmmə kɔ tsʰukpu dŭmɛ 3S-GEN TOP road-on TOP two:HUM spouse become:23S house-in one spouse be:23S all TOP three:HUM become:3P ‘Now he had two wives on the road – he had one at home – altogether they were three.’

Geographical distribution

Hayu is spoken in the following locations of Nepal. Hayu is spoken in the Sunkoshi valley, southwards across the Mahabharat range. Ethnic Hayu live on the hills on both sides of the Sun Kosi River but the language is only spoken in the villages listed.