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The second most spoken language is Hindustani. Actually Hindustani is the language that is spoken by the masses whereas the Hindi is largely confined to administrative usage. Broadly now days, Hindustani if written in 'Devanagri' script is called Hindi where as if the same is written in 'Nastaliq' script then it is termed Urdu. Uttar Pradesh has produced numerous poets and laureates both in Hindi as well as Urdu. For years these people have ruled the roost.
Apart from that, Awadhi is another popular language. The language is the Lingua Franka of the masses, particularly rural population, in Oudh. The language is a hearty mix of Urdu and Khadi Boli. This language was propagated by popular Sufi poets of their time, particularly Amir Khusrau. Bhojpuri is another popular language in Uttar Pradesh. In fact according to the latest census report, Bhojpuri is the most spoken language in Uttar Pradesh after Hindi. The speakers of this language are mostly confined to 20 odd districts of Eastern Uttar Pradesh.
'Braj Bhasha' is the language of Lord Krishna. This language is mostly spoken in regions around Mathura and Vrindavan. This language is considered to be very sweet and lyrical. There are other minor languages too such as Gujari, Haryanvi and Bundeli but these are extremely localized and confined to particular communities.