You can check if a PO file is valid with the following command:

        msgfmt -c -o /dev/null <po file>
      

The following errors were found in gatos 's PO files:

gettext: po/model/atisplit.po: can't guess language
gettext: po/model/atitogif.po: can't guess language
gettext: po/model/atitojpg.po: can't guess language
gettext: po/model/atitoppm.po: can't guess language
gettext: po/model/gatos.po: can't guess language
gettext: po/model/yuvsum.po: can't guess language
      

Please ask the translator (identified by the Last-Translator field in the PO file), the language team (identified by the Language-Team field) or debian-i18n for a fix.