Originally posted by seb2:
If your app is English, yes. Does not work for any other language.
Apple had a set of voices for Mexican Spanish at one point, actually; I don't know what happened to them in OSX.
But you're right; their speech efforts have been heavily-oriented towards the US, at the expense of basically all other languages. This bothers me, not from a standpoint of political sensitivity, but from the fact that this is a great technology which Apple has not yet tapped to its full potential.
I've toyed with the idea of trying to build a basic aural browser at some point (not a screenreader, but an actual Web browser which renders the page as speech, complete with ACSS support). But to be honest, I have no idea where to begin there either. What kind of interface should an aural browser even have?
FUN FACT: If you're into anime, you might want to check out
Serial Expeeriments Lain. Apple's "Whisper" voice sees heavy use in the series.