I only concern with FUEL is that the glossary is in pdf. Seriously? I
know
.ods and .po files are also present but storing this glossary on a
webpage(read html format) would be handy.
http://www.fuelproject.org/terminology will give you the option where you
can search for entries/strings of particular language.
I think this is as good as a plugin/html and will serve your purpose too.
Shankar