The actor went through an extended training to learn Bhojpuri for the film. The language in the film plays a key role. Aamir came up with the idea of having Bhojpuri as it will add a quirky and humorous touch to the character and at the same time people would be able to understand most of it.
The ace actor had been specially preparing for learning Bhojpuri since two years under the Bhojpuri TV writer, Shanti Bhushan who taught the actor the nuances of the language. They specially worked on the language and diction to perfect it. They would try and practice in between shoots and schedules of the film because the language is very tricky to learn and requires certain diction.
Aamir too has put in a lot of effort to perfect the language, and has created a lot of buzz by trying something different with this film.
When contacted, Shanti Bhushan said, "Rajuji called me at Vidhu Vinod Chopra's office and informed me about it. They gave me the dialogues of P.K. and asked me to convert it to the Bhojpuri - Hindi language, which audience can understand. Apart from teaching Bhojpuri, I gave the required diction training to Aamir at his house for two months where he used to write the altered dialogues according to his convenience. Since Aamir felt he would need me in case he got stuck while shooting he asked me to also accompany him during shoots. Aamir is so dedicated that he used to learn and rehearse his lines during the break or even while getting ready.
I remember last year once when he had to attend an event in Pune where he was meeting the Dalai Lama, he asked me to join him during that journey so that he could spend his travel time to learn the language better. Aamir loves the language and 'Tukur tukur' that he says in the trailer is his favourite Bhojpuri word."
P.K will be the second project that will bring together Rajkumar Hirani and Aamir Khan.