nano /etc/default/locale
LANG=pl_PL.UTF-8
LANGUAGE=pl_PL:pl
LC_NUMERIC=pl_PL.UTF-8
LC_TIME=pl_PL.UTF-8
LC_MONETARY=pl_PL.UTF-8
LC_PAPER=pl_PL.UTF-8
LC_IDENTIFICATION=pl_PL.UTF-8
LC_NAME=pl_PL.UTF-8
LC_ADDRESS=pl_PL.UTF-8
LC_TELEPHONE=pl_PL.UTF-8
LC_MEASUREMENT=pl_PL.UTF-8