Nìmpyèshiu was a language spoken by the ancient Nìmpyèràn in the nation of Hajánràngìu (Jánra̤) during the reign of Queen Ba̤ito̤, and is the ancestor of many modern Nìmpyèràn languages. Many religious texts of the Nìmpyèyìa religion were written in Nìmpyèshiu. Even after Ba̤ito̤’s reign, the language continued to be used as both a religious language and a lingua-franca.
In the years before the formation of Jánra̤ in 0 NC, a dialect of Proto-Nimpyeshiu spoken in the Hajàm province was beginning to be used a lingua-franca among traders. When Jánra̤ formed, this dialect became the official language and began to be referred to as ‘Nìmpyèshiu’. This word is widely believed to mean ‘the language of Nìm’s race’, Nìm (‘silent’) was the name of the first woman in Nìmpyèràn mythology. The term ‘nìmpyè’ was often used as a prefix to mean anything related to all of the subspecies of Nìmpyèràn, so the term ‘Nìmpyèshiu’ was coined to suggest its role as a universal language.
As the nation of Jánra̤ grew, speakers of other languages began to learn Nìmpyèshiu. These other languages were the sources of many place names, personal names, loan words and calques, and also had an influence on various regional dialects. The most important of these are Nìmpyèshiu’s sister languages: Ouchiwu, Heyuhete, Shiholiro, Sihu and Mateshiyu.