All we'd need to add for run-time is a standardized filepath listing your desired locales (which would also be uploaded to servers as an HTTP header), as well as some UIs to configure & reconfigure it!
For buildtime we'd want a suite of mostly-trivial tools to extract, analyze, edit, & compile translations. Which would mostly be converting from one format to another (keeping limited data) with or without callbacks, precisely the sort of code this hardware was designed for!
alcinnz