I can tell you there is a lot of appetite for other languages. I looked at the project and the amount of stuff that would need to be rewritten to work with multiple languages was daunting. I would consider working on making your documentation and workflow functional with multiple languages.
Lots of people have tried similar projects in other languages but as far as I know none have persevered.
Personally I think it's important to have one person in charge who is able to approve of the quality of all the project's output; for now, at SE, that person is me and I'm only an expert in English.