localectl

forage@Khazad-dum:~$ localectl
   System Locale: LANGUAGE=en_GB.UTF-8
                  LC_NUMERIC=nl_NL.UTF-8
                  LC_TIME=nl_NL.UTF-8
                  LC_MONETARY=nl_NL.UTF-8
                  LC_PAPER=nl_NL.UTF-8
                  LC_NAME=nl_NL.UTF-8
                  LC_ADDRESS=nl_NL.UTF-8
                  LC_TELEPHONE=nl_NL.UTF-8
                  LC_MEASUREMENT=nl_NL.UTF-8
                  LC_IDENTIFICATION=nl_NL.UTF-8
       VC Keymap: n/a
      X11 Layout: us
       X11 Model: pc105
     X11 Variant: altgr-intl