The evidence of this MIA exist in systematic errors in the Sanskrit language used in the Kamarupa inscriptions. This sort of Sporadic Apabhramsa is a mixture of Sanskrit, Prakrit and colloquial dialects of Assam. A distinguishing characteristic of Kamarupa inscriptions is the replacement of "ś" and "ṣ" by "s", which is contrary to Vararuci's rule, the main characteristic of Magadhi Prakrit, which warrants that "ṣ" and "s" are replaced by "ś". Linguists claim this apabhramsa gave rise to various eastern Indo-European languages like modern Assamese and felt its presence in the form of Kamrupi and Kamatapuri lects.