A free program for Android, by ai.type.

Bengali is an Indo-Aryan language with a large number of speakers, and it is the official language in two countries, Bangladesh and India. 

The ai.type Bengali Dictionary is the best mobile dictionary app for the Bengali language. It includes not only the basic vocabulary but also the most common phrases and sentences. This application will help you improve your vocabulary and understand the meaning of the words better. It is designed to work with the ai.type Keyboard, which is a next-word prediction and correction self-learning keyboard. The prediction and correction are based on the history of the last words you typed.