Georg Heeg announced an update to SeaBreeze, their GUI builder front end to Seaside:
Currently we are developing a new interesting feature for seaBreeze: Internationalization and Localization. Today we had the great break-through: The first multi-lingual seaBreeze application was up and running on my machine today. We are working together with a master course in software localization at Anhalt University. So please be patient to see progress in the not too far future.
If you're interested in becoming a beta user, follow the link for details.