How to View System Locale in Linux

$ locale
LANG=en_US.UTF-8
LANGUAGE=en_US
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

$ localectl status
System Locale: LANG=en_US.UTF-8
LANGUAGE=en_US
VC Keymap: n/a
X11 Layout: us
X11 Model: pc105

How to Set System Locale in Linux

You can find global locale settings in the following files:

/etc/default/locale – on Ubuntu/Debian
/etc/locale.conf – on CentOS/RHEL

To display a list of all available locales use the following command

$ locale -a

Then set like this:

LANG=en_US.UTF-8
LANG=ja_JP.UTF-8

Reference:
https://www.tecmint.com/set-system-locales-in-linux/