2.3.2 Locale Environment Variables A locale is composed of several locale categories, see Aspects in Native Language Support. When a program looks up locale dependent values, it does this according to the following environment variables, in priority order: LANGUAGE LC_ALL LC_xxx, according to selected locale category: LC_CTYPE, LC_NUMERIC, LC_TIME, LC_COLLATE, LC_MONETARY, LC_MESSAGES, ... LANG Va