Walter, yes, people have forward ported the internationalization
patches from 3.3+ad13 to later 3.x servers, I think including 3.4.2
and 3.5.x. But, very few people use those patches. And the AOLserver
team decided to ignore them (a long time ago now) in order to focus
their effors on 4.0.
It should be both easier and better for you to simply switch to either
3.3+ad13 or 4.0. Note that OpenACS officially supports only 3.3+ad13,
but will also support 4.0 soon (I think as soon as it's officially
released, and has nsopenssl working).