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 pysolfc 's PO files:

gettext: po/de_games.po: can't guess language
gettext: po/de_pysol.po: can't guess language
gettext: po/fr_games.po: can't guess language
gettext: po/fr_pysol.po: can't guess language
gettext: po/games.pot:15:19: invalid control sequence
po/games.pot:15:25: invalid control sequence
po/games.pot:15:29: invalid control sequence
po/games.pot:15:39: invalid control sequence
po/games.pot:15:43: invalid control sequence
po/games.pot:15:51: invalid control sequence
msgfmt: found 6 fatal errors
gettext: po/it_games.po: can't guess language
gettext: po/it_pysol.po: can't guess language
gettext: po/pl_games.po: can't guess language
gettext: po/pl_pysol.po: can't guess language
gettext: po/pt_BR_games.po: can't guess language
gettext: po/pt_BR_pysol.po: can't guess language
gettext: po/pysol.pot:726: end-of-line within string
po/pysol.pot:725: missing 'msgstr' section
po/pysol.pot:726:5: syntax error
po/pysol.pot:726: keyword "may" unknown
po/pysol.pot:727: keyword "ensure" unknown
po/pysol.pot:728: end-of-line within string
po/pysol.pot:803: missing 'msgstr' section
po/pysol.pot:805:16: syntax error
po/pysol.pot:805: keyword "cs" unknown
msgfmt: found 9 fatal errors
gettext: po/ru_games.po: can't guess language
gettext: po/ru_pysol.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.