It's not a "central dependency" that needs an "authority". It's just part of building internationalized software.
Shouldn't screen readers have intelligent heuristics to most appropriately convey context when required? Seeing as most of the web doesn't have accessibility annotations?
> Yes, you need an internationalized list of strings to detect.
Who would maintain this list and be the authority for every language on Earth?
We've managed to get this far without needing such a central dependency.