Please note that we've updated the Mount & Blade II: Bannerlord save file system which requires you to take certain steps in order for your save files to be compatible with e1.7.1 and any later updates. You can find the instructions here.
Sure I get that they needed a profanity filter but oh could they have done a better job in so many ways.
There is no game or piece of software that has as bad of a profanity filter as Bannerlord, it's incredible how badly it is designed, tested (which it obviously wasn't) and implemented. There is not a good word to say about it.