debian:/home/ch3k0# dpkg-reconfigure locale
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = "es_MX",
        LC_ALL = (unset),
        LANG = "es_MX"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
Package `locale' is not installed and no info is available.
Use dpkg --info (= dpkg-deb --info) to examine archive files,
and dpkg --contents (= dpkg-deb --contents) to list their contents.
/usr/sbin/dpkg-reconfigure: locale is not installed