— Scheme Procedure: setlocale category [locale]
— C Function: scm_setlocale (category, locale) |1 |1 |0

If locale is omitted, return the current value of the specified locale category as a system-dependent string. category should be specified using the values LC_COLLATE, LC_ALL etc.

Otherwise the specified locale category is set to the string locale and the new value is returned as a system-dependent string. If locale is an empty string, the locale is set using envirionment variables.