$ localectl
System Locale: LANG=en_US.UTF-8
               LANGUAGE=en_US
               LC_NUMERIC=pt_BR.UTF-8
               LC_TIME=pt_BR.UTF-8
               LC_COLLATE=pt_BR.UTF-8
               LC_MONETARY=pt_BR.UTF-8
               LC_PAPER=pt_BR.UTF-8
               LC_NAME=pt_BR.UTF-8
               LC_ADDRESS=pt_BR.UTF-8
               LC_TELEPHONE=pt_BR.UTF-8
               LC_MEASUREMENT=pt_BR.UTF-8
               LC_IDENTIFICATION=pt_BR.UTF-8
   VC Keymap: n/a
  X11 Layout: us
   X11 Model: pc105
 X11 Variant: alt-intl

$ cat /etc/default/locale
LANG=en_US.UTF-8
LANGUAGE=en_US
LC_CTYPE=en_US.UTF-8
LC_NUMERIC=pt_BR.UTF-8
LC_TIME=pt_BR.UTF-8
LC_COLLATE=pt_BR.UTF-8
LC_MONETARY=pt_BR.UTF-8
LC_MESSAGES=en_US.UTF-8
LC_PAPER=pt_BR.UTF-8
LC_NAME=pt_BR.UTF-8
LC_ADDRESS=pt_BR.UTF-8
LC_TELEPHONE=pt_BR.UTF-8
LC_MEASUREMENT=pt_BR.UTF-8
LC_IDENTIFICATION=pt_BR.UTF-8
LC_ALL=en_US.UTF-8