The Bigg Boss rules are a farce and a convenient tool for BB to be used when they want to implement something totally unfair and still remain self-righteous.
Over the seasons BB have always used the supposed breaking of BB rules for their own manipulation.
IMO it's not even humanly possible to only speak in Hindi all the times or not to allow someone, something as basic as using a bathroom or giving some extra food items that one can easily spare. So all this sham about breaking rules is just that, a sham.
Another convenient use of breaking rules used by BB is to humiliate any housemates that BB wants. Obviously rules were broken even during Shamita's captaincy, but for whatever reasons BB wanted to humiliate Nishant.