Attached, Zimbra 4.0.3 user interface spanish translation.
ZmMsg_es.properties -> web interface.
AjxMsg_es.properties -> Dates, months, days, etc
ZMsg_es.properties -> Error messages
ZsMsg_es.properties -> email notifications *
* At this moment, ZsMsg_es.properties is not properly user by system. There is an open support case for this. Remember that ZsMsg.properties has an special location: /opt/zimbra/conf/msgs
Any suggestion will be welcomed.