The issue appears if one wants to create a new paragraph based on a paragraph which uses already messages. In that case one would like to chain two bundles.

After a short discussion we found several potential solutions

A) use a special syntax in labels, .. bundle:key
B) support @include tags in the messages files (postprocess file in DefaultMessagesImpl.getBundle())
C) allow comma separated lists in i18nBasename definitions (could be a general feature of the MessageManager or part of the FreemarekerHelper)
D) site wide template messages (register the bundles to use in a central place: MAGNOLIA-1519)