[goobatrooba]

Not sure why you are speculating or what your background would be to do so, when the info is easy to find. Yes it was a link language given its prominence, but also

> Sanskrit was a spoken language in the educated and the elite classes, but it was also a language that must have been understood in a wider circle of society because the widely popular folk epics and stories such as the Ramayana, the Mahabharata, the Bhagavata Purana, the Panchatantra and many other texts are all in the Sanskrit language, while many Sanskrit dramas indicate that the language coexisted with the vernacular Prakrits.[115] Thus, Classical Sanskrit with its exacting grammar was the language of the Indian scholars and the educated classes, while others communicated with approximate or ungrammatical variants along with other natural Indian languages,[114] with the cities of Varanasi, Paithan, Pune and Kanchipuram being centres of Sanskrit learning and debate until the arrival of the colonial era

(Wikipedia - https://en.wikipedia.org/wiki/Sanskrit )