Keeping the character brief in mind, Taapsee is required to mouth a few lines which require great authenticity and strong control over the language.
To pursue this Taapsee has signed on for a personal tutor and is now finding time in between her schedules to learn Urdu, practice it between her travel work schedules.
She in fact has been advised by her friends to watch Urdu plays to understand the flow of the language and have a better sense of diction.