I'm having a hard time reproducing this problem.
Here's what I did:
1. Run script wedding.roo and quit Roo
2. Add to src/main/webapp/WEB-INF/i18n/messages.properties:
3. Add to src/main/webapp/WEB-INF/views/rsvp/create.jspx:
When I then mvn tomcat:run, and I elected to create a new RSVP, I correctly saw, The message is: Hello world".
The message is: <spring:message code="my.title"/> <br/>
So it seems to be working out-of-the-box as far as I can see. Can you please clarify what I need to do to reproduce the problem?