* Hindi: His native language, although he was a proponent of Hindustani, a blend of Hindi and Urdu.
* Urdu: He was proficient in Urdu, particularly its literary form.
* English: He was highly educated in English and used it extensively in his writings, speeches, and diplomatic work.
* Persian: He had a good command of Persian, which was historically important in India.
* French: He learned French later in life and was comfortable speaking and writing in it.
He likely had some understanding of other Indian languages as well due to his extensive travels and interactions with people from various parts of the country.