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It can't work, anytime in the immediate future. My longterm belief is that entries should be wrapped in a something (presumably a template) so that each piece of data in an entry is only entered once. That would mean no sort keys for Japanese, no need to manually specify the genitive singular for every Latin noun, and tons of other benefits to editors. Unfortunately, that's not what we have to work with now, so I still won't touch Japanese sorting unless I have an idea or the situation changes.

That's some of what I was exploring a while back with a suggestion of reworking entry structures to use subpages for each language. Our current data model is horrifically abnormal (from a database standpoint), and that makes all kinds of things much more difficult or even impossible. I do terminology work in my day job, and we use actual database-backed tools with proper data models. Things that are trivial there are non-starters here. I'm no whiz DBA, but I know enough to know that "everything as text in one page" is ... I don't know what to call it, but "anti-model" might be the best term.

Anyway, I met all kinds of opposition to my suggestion, and it didn't (and still doesn't) strike me as all that radical; much luck to you for coming up with an approach for better data organization that garners a more positive response.