I have a form which contains a rich:calendar, with a messages component on the form. I have the fields grouped in a panelGroup, and the messages specified "for" that panelGroup. Although this works well, I have a problem wih the calendar: it sets error messages on the component id. When I add an extra messages tag specifically for the calendar, it comes with a messages that starts with the full id "blaRhubarbId:FormId:componentId" followed by an English message. The locale for the application is set to "nl" however. So I guess either there is no message bundle with Dutch messages, or something else is wrong.
How can I get in my own messages? The reference documentation does not provide any hints on the messages used/generated by the component?