$ apt search language-pack-
$ sudo apt install language-pack-zh-hans language-pack-zh-hans-base
$ sudo apt install language-pack-en language-pack-en-base
$ localectl # display current settings
$ localectl list-locales # display the list of locale
$ sudo localectl set-locale LANG=en_US.UTF-8
$ sudo localectl set-keymap us
$ sudo localectl set-x11-keymap us