What is the Windows Equivalent of the 'en_US.UTF-8' Locale?

Windows equivalent for en_US.UTF-8 locale

In programming, setting the locale is crucial for handling text input and output in the correct language and format. If you're porting code from another platform that specifies the "en_US.UTF-8" locale, you may wonder what its Windows equivalent is.

Historically, UTF-8 wasn't supported as a system locale in Windows due to compatibility concerns. However, Microsoft has gradually introduced UTF-8 support.

To enable UTF-8 locale support in Windows:

1. Windows 10 build 17035 and later: Go to Region settings and enable "Use Unicode UTF-8 for worldwide language support." Then, use setlocale() with ".utf8" as the code page.
2. Windows prior to 10: Use app-local deployment or statically link with version 17134 of the Windows SDK.
3. Windows 10 build 17134 and later (2019): Use the "/execution-charset:utf-8" option when compiling with MSVC or set the ActiveCodePage property in appxmanifest.

Once UTF-8 support is enabled, you can use setlocale() as you would on other platforms, specifying "en_US.UTF-8" as the desired locale. Notably, this ensures that text input and output will be handled using the UTF-8 encoding, which supports a wide range of characters.

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