Get or set the current locale, used for various internationalizations. Locales are strings, such as ‘sv_SE’.
If locale is given then the locale for the given category is set and the new value returned. If locale is not given then the current value is returned. category should be one of the following values (see Categories of Activities that Locales Affect in The GNU C Library Reference Manual):
A common usage is ‘(setlocale LC_ALL "")’, which initializes all
categories based on standard environment variables (
For full details on categories and locale names see Locales and Internationalization in The GNU C Library Reference
setlocale affects locale settings for the whole
process. See locale objects and
make-locale, for a thread-safe alternative.