How to get the locale of the current user in OSX using C++

Question

I have a C++ application where I need to retrieve the locale of the current user. How can I do it with OSX Yosemite and newer?

I've tried something like setlocale(LC_CTYPE, NULL); but it just returns UTF-8 where my system is clearly in Spanish (es_AR)

Have you tried [this](http://stackoverflow.com/questions/12170488/how-to-get-current-locale-of-my-environment)? — NathanOliver, Aug 31 '16 at 17:27
I just tried, but it does not work with OSX. My code: setlocale(LC_ALL, ""); setlocale(LC_CTYPE, NULL); and the result is UTF-8 — Fernando, Aug 31 '16 at 17:29

score 5 · Accepted Answer · edited Apr 27 '23 at 19:49

After some try and error and lot of help from internet and other questions I did it.

If I want to get only the language.

CFLocaleRef cflocale = CFLocaleCopyCurrent();
auto value = (CFStringRef)CFLocaleGetValue(cflocale, kCFLocaleLanguageCode);    
std::string str(CFStringGetCStringPtr(value, kCFStringEncodingUTF8));
CFRelease(cflocale);

This way, at str I'll get a std::string with the language. If I need something else, I can replace kCFLocaleLanguageCode with any other constant from CFLocale

Also I needed the header #include <CoreFoundation/CoreFoundation.h>

How to get the locale of the current user in OSX using C++

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