As a contrib module, the journal module language strings should remain on journal/lang/*
Attached catalan translation for journal. File must be renamed to journal.php and placed into directory moodle/lang/ca/ or moodle/mod/journal/lang/ca/
Many thanks for the contribution Toni, I only replaced the vars according to the 2.x format http://docs.moodle.org/dev/Using_variables_in_localization_strings and commited the changes
Thanks for the fix. I didn't realize there was a change there.