Ada Programming/Libraries/Ada.Locales

is a unit of the Predefined Language Environment since Ada 2012.

Specification
PreelaborateLocales Remote_TypesLocales Language_Code  String 1  3 Dynamic_Predicate E Language_Code  E  a  z     Country_Code   String 1  2 Dynamic_Predicate E Country_Code   E  A  Z    Language_Unknown   Language_Code  "und" Country_Unknown  Country_Code  "ZZ" Language Language_Code Country Country_Code AdaLocales

Wikibook

 * Ada Programming/Libraries/Ada