An argument over the language used to write an FIR took a nasty turn for two lady constables after they were bitten by two women. The accused were upset that the document had been prepared in Marathi instead of Hindi or English.The drama played out at Arnala police station on Monday night and ended with the arrest of Pragyan Singh and her sister Gargi on the charge of assaulting four women constables and a male cop. The sisters have been remanded in police custody till Thursday.As per rules, a first information report (FIR) is to be written in the language of the state. In this case, the police said, they had merely followed the law.Virar residents Pragyan, 32, and Gargi, 28, first approached the Arnala police on February 27 to lodge a complaint of molestation against some unknown persons. They visited the police station two days later to know the status of their complaint, when things went wrong.The Singh sisters picked up an argument with on-duty officer as to why Hindi or English had not been used in the FIR. “Despite attempts by constable Rupali Bhoir, who is seven months pregnant, they were in no mood to listen,” said API Sandip Shivle of Arnala police station.Soon, the heated exchange devolved into a show of aggression, with the sisters biting Manisha Awti’s right hand. The also sank their teeth into the right hand and right leg of Jayanti Rajguru, said API Shivle.While constable Priyanka Patil and a male cop, Sachin Tambve, intervened, they were assaulted. Tambve was hit in the eye, alleged the police, adding that the sisters were constantly shouting expletives.“It is the government policy to write all FIRs in Marathi which is the state language. Our staff tried to explain them, but they got aggressive.” said DSP Narsinh Bhosle of Vasai circle.Bhosle said the injured policewomen were treated at the local primary health centre. He said they had transferred the case to their parent police station in Virar. “They should have approached the Virar police for an update. We have CCTV footage which clearly shows them assaulting cops.”