Indian English is spoken by over 125 million people and it does not do the needful of following British rules anymore. It has its own swagger, from "prepone" to "timepass" to calling everyone "yaar". Decades of Bollywood, cricket commentary and IT culture have made it a variety that slaps different.
Yaar
"Yaar, I told you not to eat the canteen biryani on a Monday. Now look at you, holding your stomach like you swallowed a grenade, and the meeting starts soon."
Achha
"Achha, so you are telling me you studied all night but somehow slept through the exam? Achha achha, very interesting story, let me just check your Netflix history real quick."
Prepone
"Boss wants to prepone the client call to 9 AM instead of 11. That means waking up at 7 on a Monday, which honestly should be against the Geneva Convention."
Chakka jam
"Left for the airport three hours early and still almost missed the flight because of a full chakka jam on the highway. An overturned truck, two weddings, and a cow."
Do the needful
"I have attached the documents and forwarded the approval chain. Kindly do the needful by end of day. And by that I mean today, not your version of today."