You are on the right path, looking at the hyphenation rules. The attributes here also control break before and break after. It has been some time since I played here but I think you need to specify every (and I mean every) character than someone might type in this area in the breakafter attribute.
You put a specific language code on the hyphenation rule and then indication that this is the language in use in some other attribute. Again, much too long since I had to do this. But it is possible. John Dreystadt Software Development Director Arbortext - PTC 734-352-2835 -