Analysis of information sources in references of the Wikipedia article "Languages of India" in English language version.
The Indic family has the sub-families of North Indian and Dravidian
... Hindustani is the basis for both languages ...
The Bengali linguists Suniti Kumar Chatterji and Sukumar Sen suggested that Bengali had its origin in the 10th century ce, deriving from Magahi Prakrit (a spoken language) through Magahi Apabhramsha (its written counterpart).
The Bengali scholar Muhammad Shahidullah and his followers offered a competing theory, suggesting that the language began in the 7th century CE and developed from spoken and written Gauda (also, respectively, a Prakrit and an Apabhramsha).
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: CS1 maint: numeric names: authors list (link)The movement for recognizing Manipuri as a classical language began in 2013, yet there has been a gap in the follow up actions.
…a Chinese-Sanskrit Dictionary compiled by Li-Yen bears testimony to the fact that at least 51 Bangla words made their way into that dictionary…The Chinese-Sanskrit dictionary, compiled in the 8th Century CE, included or rather was compelled to include words of a third language, i.e., Bangla.
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