* Bangladesh: Bengali is the official language of Bangladesh and is spoken by the vast majority of the population.
* India: Bengali is the official language of the Indian state of West Bengal and is also spoken in the states of Tripura and Assam.
* Other Countries: Bengali is also spoken by significant communities in other countries like Pakistan, Myanmar, Nepal, and Sri Lanka.
It's important to note that while Bengali is the official language in Bangladesh and West Bengal, it's not the only language spoken in these regions. Other languages are also spoken in these countries, though Bengali is dominant.