That’s too bad!
I have not found a single decent plugin enabling a staging-to-production process that a) can merge staged updates into the production database without messing up new posts/comments on the production site, and b) supports WPML.
You’ve got (a) down, I think if you tackle (b) you can become huge ?? The big boys like Duplicator and Migrate DB Pro can’t even do (a). I’d say there must be plenty of businesses with WPML-based multilingual WordPress websites that post ongoing news articles or blog posts on production, and desire easy staging-to-production for updates to their marketing/products/contact pages.
I’ll keep an eye out.