Analysis of information sources in references of the Wikipedia article "Sanskrit revival" in English language version.
The study of any ancient (or dead) language is faced with one main challenge: ancient languages have no native speakers who could provide us with examples of simple everyday speech
Some of the migrated languages ... such as Sanskrit and English, remained primarily as a second language, even though their native speakers were lost. Some native languages like the language of the Indus valley were lost with their speakers, while some linguistic communities shifted their language to one or other of the migrants' languages.
Sanskrit is also the only scheduled language that shows wide fluctuations — rising from 6,106 speakers in 1981 to 49,736 in 1991 and then falling dramatically to 14,135 speakers in 2001. "This fluctuation is not necessarily an error of the Census method. People often switch language loyalties depending on the immediate political climate," says Prof. Ganesh Devy of the People's Linguistic Survey of India. ... Because some people "fictitiously" indicate Sanskrit as their mother tongue owing to its high prestige and Constitutional mandate, the Census captures the persisting memory of an ancient language that is no longer anyone's real mother tongue, says B. Mallikarjun of the Center for Classical Language. Hence, the numbers fluctuate in each Census. ... "Sanskrit has influence without presence," says Devy. "We all feel in some corner of the country, Sanskrit is spoken." But even in Karnataka's Mattur, which is often referred to as India's Sanskrit village, hardly a handful indicated Sanskrit as their mother tongue.
