The process of incorporation of the modern linguistic knowledge comes through the Sanskrit language employed the Vedas, known as a sacred literature. In the northern and central portions of South Asia, the Indo-Aryan came to predominance over a period of centuries.
A constant change and development is seen in the languages as the Indo-Aryan speakers spread across northern and central India. Common forms of speech or ‘Prakrits’ were widespread thought the north by about 500 B.C. The "sacred," "polished," or "pure" tongue--Sanskrit--used in religious rites had also developed along independent lines about the same time by changing drastically from the form used in the Vedas. The preservation of archaic forms lost in the Prakrits in ritual settings is encouraged. A detailed science of grammar and phonetics and an alphabetical system seen by some scholars as superior to the Roman system was evoked when the concerns for the purity and correctness of Sanskrit was stressed. Panini’s works in the fourth century B.C culminated the Sanskrit grammar, the Ashtadhyayi (Eight Chapters), set the basic form of Sanskrit for subsequent generations. Panini's work is often compared to Euclid's as an intellectual feat of systematization.