Locale variables

Variable	What it's for
LANG	The basic language setting used by applications on the system, unless overridden by one of the other locale environment variables
LC_CTYPE	The character set used to display and input text
LC_NUMERIC	How non-monetary numeric values are formatted on screen
LC_TIME	How date and time values are formatted
LC_COLLATE	How to sort various information items (e.g. defines the order of the alphabet so items can be ordered alphabetically by the sort command)
LC_MONETARY	How monetary numeric values are formatted
LC_MESSAGES	Which language is to display messages to the end user
LC_PAPER	Definitions of paper formats and standards
LC_NAME	How names are formatted
LC_ADDRESS	How to display address information
LC_TELEPHONE	How telephone numbers are structured
LC_MEASUREMENT	What units of measurement are used
LC_IDENTIFICATION
LC_ALL	This variable serves as a powerful override over all the other locale environment variables. When its value is set, applications use that value to determine which locale settings to use regardless of the values of the other variables