On the day of 21 February 1952 five students and political activists were killed during protests near the campus of the University of Dhaka.
In 1956 Bengali was made a state language of Pakistan.
Dominant in the last group was Persian, which was also the source of some grammatical forms.
More recent studies suggest that the use of native and foreign words has been increasing, mainly because of the preference of Bengali speakers for the colloquial style.
It is also one of the 22 scheduled languages of India.With 205 million speakers, Bengali is the seventh most spoken native language in the world by population.Dictionaries from the early 20th century attributed slightly more than half of the Bengali vocabulary to native words (i.e., naturally modified Sanskrit words, corrupted forms of Sanskrit words, and loanwords from non-Indo-European languages), about 30 percent to unmodified Sanskrit words, and the remainder to foreign words.In the dialects prevalent in much of eastern and south-eastern Bangladesh (Barisal, Chittagong, Dhaka and Sylhet Divisions of Bangladesh), many of the stops and affricates heard in West Bengal are pronounced as fricatives. The influence of Tibeto-Burman languages on the phonology of Eastern Bengali is seen through the lack of nasalized vowels and an alveolar articulation of what are categorised as the "cerebral" consonants (as opposed to the postalveolar articulation of West Bengal).Some variants of Bengali, particularly Chittagonian and Chakma, have contrastive tone; differences in the pitch of the speaker's voice can distinguish words.