The one edge case is that the bells work for all blind folks, not just those who understand the language spoken by and announcement. Of course, a blond person in that case could just count announcements …
> Of course, a blond person in that case could just count announcements …
Exactly, he's not worse off.
Besides, I've traveled in foreign countries where I literally do not know a single word in that language. You start picking up words by association almost immediately.