https://learn.microsoft.com/en-us/dotnet/api/system.globalization.cultureandregioninfobuilder.regionenglishname?view=netframework-4.7.2
CultureAndRegionInfoBuilder.RegionEnglishName Property (System.Globalization) | Microsoft Learn
Gets or sets the full name of the country/region in English.
property systemglobalizationmicrosoftlearn