
In the dissertation "Assamese: Its Formation and Development" by Dr. Banikanta Kakati (accepted by the University of Calcutta in 1935), it is discussed that both the languages had parallel devolpments. The Following were some of the points he discussed in the disertation:
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Well now if someone says that Assamese is just an extension of Bengali, then he'll be in for a long discourse from me. Though the Assamese language bears similariities with the North Bengal dialect. Assamese language is the simplification of the kamrupi dialect. The Kamrupi dialect was spoken from Koch Bihar, Rongpur, Jalpaiguri to Assam. Historically, ancient Assam (Pragjyotish) covered from koch Bihar to present west Assam. One of the comments from my read went as follows:
"Kamrupi dialect of Assamese and North Bengali are quite similar. In fact, the similarities between Assamese (standard as well as Kamrupi) and North Bengali are much more pronounced than the similarities between Standard Bengali and North Bengali. North Bengal was the seat of Assamese studies under the Koch kings. But, history has taken North Bengal away from Assamese culture altogether."
The Indian languages have their origins in sanskrit, so no wonder there are similarities between them. Even Dravidian languages are influenced by sanskrit. Such a fantastic common thread is woven into our social fabric still there's regionalism and anti-Hindi sentiments particularly in South and North East India. What if Sanskrit would have been our national language, Would then there would have more of closeness between the North & South. Though for the development of the nation I still believe English holds the key.
That was quite a bit of work out mentally, and I started Gym too today. Lot of energy wasted, better I go off to sleep.
Gute Nacht.
(Good Night in German)
PS: I am learning to write Assamese and trying to speak a decent Bengali. German, I think I'll leave that for the future.