How to Set Locales (i18n) On a Linux or Unix

/etc/sysconfig/i18n

The /etc/sysconfig/i18n file sets the default language, any supported languages, and the default system font. For example:

LANG="en_US.UTF-8" 
SUPPORTED="en_US.UTF-8:en_US:en" 
SYSFONT="latarcyrheb-sun16"