This seems great in concept, and totally infeasible. But if anyone can do it, unicode seems like a great candidate.
Does anyone have reason for more optimism?
Unicode consortium already manages a ton of language specs. If there's any group of folks I'd trust to understand languages (natural or otherwise), it's them.
I've been using this format for almost 10 years, and I only see increasing adoption. Why would I be pessimistic?
Care to explain why you think it's infeasible? Then one could provide targeted counter-optimism ;)
I don't see what's infeasible about it. It doesn't seem too different from .po files (gettext catalogs) meshed with hooks for post-processing as would see in e.g. a handlebars, both of which have individually found great adoption.