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 tryton-sao 's PO files:

gettext: locale/de.po:655: duplicate message definition...
locale/de.po:3: ...this is the location of the first definition
msgfmt: found 1 fatal error
gettext: locale/es_419.po: can't guess language
gettext: locale/fr.po:654: duplicate message definition...
locale/fr.po:3: ...this is the location of the first definition
msgfmt: found 1 fatal error
gettext: locale/hu.po:639: duplicate message definition...
locale/hu.po:3: ...this is the location of the first definition
msgfmt: found 1 fatal error
gettext: locale/it.po:651: duplicate message definition...
locale/it.po:3: ...this is the location of the first definition
msgfmt: found 1 fatal error
gettext: locale/lo.po:659: duplicate message definition...
locale/lo.po:3: ...this is the location of the first definition
msgfmt: found 1 fatal error
gettext: locale/ro.po:637: duplicate message definition...
locale/ro.po:3: ...this is the location of the first definition
msgfmt: found 1 fatal error
gettext: locale/ru.po:634: duplicate message definition...
locale/ru.po:3: ...this is the location of the first definition
msgfmt: found 1 fatal error
      

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.