root@LenovoX:/# dpkg-reconfigure locales
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = "pl_PL:en_GB:en",
	LC_ALL = (unset),
	LC_PAPER = "pl_PL.UTF-8",
	LC_ADDRESS = "pl_PL.UTF-8",
	LC_MONETARY = "pl_PL.UTF-8",
	LC_NUMERIC = "pl_PL.UTF-8",
	LC_TELEPHONE = "pl_PL.UTF-8",
	LC_IDENTIFICATION = "pl_PL.UTF-8",
	LC_MEASUREMENT = "pl_PL.UTF-8",
	LC_TIME = "pl_PL.UTF-8",
	LC_NAME = "pl_PL.UTF-8",
	LANG = "pl_PL.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").