Forum OpenACS Development: Response to message catalog file format, syncing of message catalog files with database

Peter, when we were looking at it the issue we had with the sort
of fallback you are talking about was that unless you were
sort of careful about it, it could be a real performance issue
for any site not a "primary" (fr_CA, es_US etc) where almost
all catalog lookups end up having to go through an extra step or
two to find their message.  It's probably not a big deal if it does not mean going to the DB though.

The only other issue is in terms of maintainability, the en_GB entry
where needed is easily overlooked when changing the en_US message.