How to change system language on Fedora 22 and Debian 8 ?

Fedora 22:

In Root terminal:

Show current setting:
[root@fedora22~]# echo $LANG
en_US.UTF-8

Change current setting:
[root@fedora22~]# vi /etc/locale.conf
LANG="en_US.UTF-8"

Modify language setting:
LANG="en_US.UTF-8"
e.g. LANG="hu_HU.UTF-8"

Apply new setting:
[root@fedora22~]# source /etc/locale.conf

Show current setting:
[root@fedora22~]# echo $LANG
LANG="hu_HU.UTF-8"

Table of locales:
https://docs.moodle.org/dev/Table_of_locales

http://www.server-world.info/en/note?os=Fedora_20&p=locale


Debian 8:

In Root terminal:

vi /etc//default/locale

Modify language setting:
LANG="en_US.UTF-8"
e.g. LANG="hu_HU.UTF-8"

Apply new setting:
dpkg-reconfigure locales

Table of locales:
https://docs.moodle.org/dev/Table_of_locales

https://wiki.debian.org/ChangeLanguage