Currency(Rial) and language(Persian) belong to Iran for now but you can replace it with your own
Fiat api because of sanctions does not work in sanctioned countries like Iran , to resolve this problem use proxy to connect or use server/host that is out of country like germany hosts or at last you can use your api
Just put last release package in your server/host that support PHP
Visit https://github.com/amirhosseinmp02/BitcoinMiningCalculator for ASP.NET Core version