Capt.m....
Expats do not convert their licenses. They are issued a Foreign Air Transport Authorization (FATA). A FATA is tantamount to a validation. One must maintain their qualifications to airman's certificate current and medical in order for a FATA to be issued. With that being said... no conversion.
Can't say I can comment on the aviation system works in Nairobi.
Most expats in India are from countries whose aviation agencies record keeping systems are computerized and are almost, and I say again almost bullet proof. With that being said it is rather unlikely that aviation officials from those countries would or could be complicit in such a scheme as endemic in India.