¿Qué te dice el comando "locale" y "dpkg -l | grep locales"?
Locate: 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=es_PY LC_CTYPE="es_PY" LC_NUMERIC="es_PY" LC_TIME="es_PY" LC_COLLATE="es_PY" LC_MONETARY="es_PY" LC_MESSAGES="es_PY" LC_PAPER="es_PY" LC_NAME="es_PY" LC_ADDRESS="es_PY" LC_TELEPHONE="es_PY" LC_MEASUREMENT="es_PY" LC_IDENTIFICATION="es_PY" LC_ALL= y "dpkg -l | grep locales" ii icedove-locale-es-ar 1.5.0.7-1 Spanish (AR) language package for IceDove ii liblocale-gettext-perl 1.05-1 Using libc functions for internationalizatio ii locales 2.3.6.ds1-8 GNU C Library: National Language (locale) da ii localization-config 1.0~rc2 configures different programs' locale settin ii mozilla-firefox-locale-es-ar 2.0.0.3+debian-1 Spanish (Argentina) language package for Ice ii thunderbird-locale-es-ar 1.5.0.7-1 Transitional package for thunderbird rename ii util-linux-locales 2.12r-15 Locales files for util-linux