Problem setting dates with picker on catalan language

I opened an issue on support.atlasian.com for JIRA and the support tech says me to open an issue on http://jira.atlassian.com/browse/TRANS but this project seems to has no activity.

Recently I open the issue JRA-16233 for Catalan translation and all its fine but seems that some problems appears with the date picker. You can see the issue transcription on https://support.atlassian.com/browse/JSP-34990 (Its private because contains confidential data). Any way, I'll update here a briefing of the issue.