Editing diacritics in the price

Hi, I would like to ask if it is possible to adjust the accent on the price? I use the Czech crown menu and the sign for the Czech crown is correctly “K?”, or as an option I tried to disable the display of the currency and in the field where the price of the product is entered, unfortunately it does not take any modification for me to add “K?” to it… “C” with a hook. Thank you in advance for your answer.