I just wanted to add a few comments on this issue.
We, at Greenpeace, are working on ACS 4.2 and have been using a somewhat modified version of acs-lang. It would be very important to start folding into OpenACS 4.2 the same mechanism, similar to what Henry Minsky is mentionning (the get_string). Henry is the original designer of the acs-lang so it would be very important to ask him about this, he seems to have extensive experience on this issue.
So, instead of having to go through the source of all the tcl and adp files, you could simply edit the localized messages in a central location. Qt 3.0 has a similar mechanism. acs-lang needs some work, that's true, but that would be a major advantage for the internationalization of OpenACS. I am going on holidays soon but will work on this (on ACS 4.2 but I am willing to spend the extra effort of working on a version that would be used in OpenACS, but this needs coordination with all the other module owners).
