You can change the locale in a terminal session by setting the LANG variable as follows:
$ export LANG=locale
For example, to change to the de_DE.UTF-8 locale, you would type:
$ export LANG=de_DE.UTF-8
To verify the locale has been successfully changed, run the locale(1) command:
$ locale LANG=de_DE.UTF-8 LC_CTYPE="de_DE.UTF-8" LC_NUMERIC="de_DE.UTF-8" LC_TIME="de_DE.UTF-8" LC_COLLATE="de_DE.UTF-8" LC_MONETARY="de_DE.UTF-8" LC_MESSAGES="de_DE.UTF-8" LC_ALL=
To obtain the list of locales available in a system, run the following command:
$ locale -a
To install more locales, see Installing Additional Locales.