Multilingual iPhone?

Watching the very impressive demo of the new Apple iPhone, I was wondering whether the version of OS X (as well as the email client and the browser) incorporated in it will support the same multilingual features that 10.4 does. I haven't seen any mention of this in reports from MacWorld or elsewhere so far. It would be cool to point the browser at a test site like this one and see what all can at least be displayed.