serverpp:~# apt-get install --reinstall locales
Reading Package Lists... Done
Building Dependency Tree... Done
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded.
Need to get 0B/3985kB of archives.
After unpacking 0B of additional disk space will be used.
Do you want to continue? [Y/n] Y
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = "es_ES",
        LANG = "spanish"
    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
Preconfiguring packages ...
(Reading database ... 41913 files and directories currently installed.)
Preparing to replace locales 2.3.2.ds1-22 (using .../locales_2.3.2.ds1-22_all.deb) ...
Unpacking replacement locales ...
Setting up locales (2.3.2.ds1-22) ...
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = "es_ES",
        LANG = "spanish"
    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
Generating locales...
  en_US.ISO-8859-1... done
  es_AR.ISO-8859-1... done
  es_AR.UTF-8... done
Generation complete.

serverpp:~# locale
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
LANG=spanish
LC_CTYPE="es_ES"
LC_NUMERIC="es_ES"
LC_TIME="es_ES"
LC_COLLATE="es_ES"
LC_MONETARY="es_ES"
LC_MESSAGES="es_ES"
LC_PAPER="es_ES"
LC_NAME="es_ES"
LC_ADDRESS="es_ES"
LC_TELEPHONE="es_ES"
LC_MEASUREMENT="es_ES"
LC_IDENTIFICATION="es_ES"
LC_ALL=es_ES
serverpp:~#