Classical Newar
Classical Newar or Classical Nepal Bhasa also known as Old Newar, is the vernacular and literary form of Nepal Bhasa used prior to the 19th century. The term is most generally used to describe the form of Nepal Bhasa used in manuscripts and other sources from the Malla dynasty.
The antiquity of the Newar language is not known. The Sanskrit stone inscriptions from the Licchavi Dynasty contains frequent use of Tibeto-Burman words, especially for proper nouns like names of person, settlements and rivers, suggesting the existence of a vernacular Tibeto-Burman language, which is believed to be an early form of the Newar language.''''
Ancient era
The earliest known document in Nepal Bhasa is called "The Palmleaf from Uku Bahal" which dates back to 1114 AD.
छीन ढाको तृसंघष परिभोग। छु पुलेंग कीत्य बिपार वस्त्र बिवु मिखा तिवु मदुगुन छु सात दुगुनव ल्है
Medieval era
The language continued growing in the Medieval period, and enjoyed royal patronage. Noted royal writers include Mahindra Malla, Siddhinarsingh Malla, Jagatprakash Malla etc. An example of the language used in that period is provided by lines of Mooldevshashidev written by Jagatprakash Malla which verse describes Shiva and the use of a tiger skin as his seat.History
This language was the official language of Nepal from Licchavi era to Malla era of Nepal. Newar words appeared in Sanskrit inscriptions in the Kathmandu Valley for the first time in the fifth century. The words are names of places, taxes and merchandise indicating that it already existed as a spoken language during the Licchavi period. The inscriptions from the Licchavi period includes Newari words.The earliest dated stone inscription in Thakuri dynasty is in Newar, dated Nepal Sambat 293.The earliest important books of Classical Newar from the 14th century are Haramekhalā, Mānava Nyāyaśāstra, Amarkośa, and Gopālarāja Vaṃśāvalī.