https://learn.microsoft.com/zh-cn/dotnet/api/system.globalization.cultureinfo.threeletterwindowslanguagename?view=netframework-4.8.1&viewFallbackFrom=net-5.0
CultureInfo.ThreeLetterWindowsLanguageName Property (System.Globalization) | Microsoft Learn
Gets the three-letter code for the language as defined in the Windows API.
property systemglobalizationmicrosoftlearn
https://learn.microsoft.com/it-it/dotnet/api/system.globalization.cultureinfo.threeletterwindowslanguagename?view=netframework-4.8
CultureInfo.ThreeLetterWindowsLanguageName Property (System.Globalization) | Microsoft Learn
Gets the three-letter code for the language as defined in the Windows API.
property systemglobalizationmicrosoftlearn