At the 10/4 event announcing the iPhone 4S, Apple said the "Siri" personal assistant of this device will include dictation capabilities and its other speech recognition features in English (US, UK, Australia), French, and German. More languages were promised for later (including Japanese, Chinese, Korean, Italian, and Spanish in 2012). I understand that an internet connection is required.
The 4S also for the first time includes a Hindi and Hawaiian keyboard. There are new dictionaries for Hindi, Hawaiian, Estonian, Latvian, and Cherokee.