Bengali also known by its endonym Bangla (বাংলা), is an Indo-Aryan language primarily spoken by the Bengalis in South Asia, specifically in the eastern part of the Indian subcontinent, presently divided between Bangladesh and the Indian states of West Bengal, Tripura, Assam's Barak Valley (lower Assam). With approximately 228 million native speakers and another 37 million as second language speakers, Bengali is the fifth most-spoken native language and the seventh most spoken language by the total number of speakers in the world.
Know more about Bengali, See Bengali Language wiki.