yes, that would be very fine and that's what i miss too.
We also have a web based groupware solution pimped with prism as
a site specific browser to deliver/bring some more desktop like features
to our users.
There we support multipe dictionaries/languages to do spell-checking.
On context menu you can do spell-checking and switching the dictionary
you want to use. (out of the installed ones, one is the prefered/default one)
That will be a good and usefull enhancement for ZD too
Regards...
Milagro