I think it would be a good idea to mark the modules that use unicode fonts on the web site and in Install Manager. And in BibleCS, perhaps a message could pop-up, in some unused area, if the user tries to use a unicode based module without unicode support. Something like, Warning: Unicode support not found. [Details]. Clicking on Details would give the info on: why unicode is needed, how to find it and install it, and the limitations.
Jerry