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 spyder 's PO files:

gettext: spyder/locale/fr/LC_MESSAGES/spyder.po:2514: 'msgid' and 'msgstr' entries do not both end with '\n'
spyder/locale/fr/LC_MESSAGES/spyder.po:3232: 'msgid' and 'msgstr' entries do not both end with '\n'
spyder/locale/fr/LC_MESSAGES/spyder.po:3240: 'msgid' and 'msgstr' entries do not both end with '\n'
spyder/locale/fr/LC_MESSAGES/spyder.po:4320: 'msgid' and 'msgstr' entries do not both end with '\n'
msgfmt: found 4 fatal errors
      

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.