Changes in the International screen include a slew of additional languages for Siri, including several dialects of Chinese, Canadian English, Italian, Korean, and Spanish (Mexico, U.S., and Spain). There are also a couple additional keyboard options, including Canadian and Australian English, and a few new region formats.
The Shortcuts capability added in iOS 5 has been revamped in iOS 6; it now has its own sub-menu, with a more user-friendly catalog of entries that resembles the Contacts list, and it's now searchable.
The biggest new feature in the Accessibility screen is Guided Access mode. When enabled, Guided Access keeps the iOS device in the current app and lets you control which features are available. To activate Guided Access for an app, you just triple-press the Home button; this enters a setup mode where you draw circles around each area on the screen you don't want to be accessible--for example, a Settings button. Tap Options to disable touch or the device's accelerometer (hardware buttons are always disabled when Guided Access is activated). Click Start and the app is protected. To exit Guided Access, you again triple-press the Home button and then enter your Guided Access passcode. Though intended to help those with accessibility difficulties, this feature is also useful for parents looking to limit their iOS device to a single app and to restrict access to particular features.
New in the Accessibility screen on iPhones is a Hearing Aids option that lets you connect to a compatible hearing aid; a new Hearing Aid mode improves audio quality when used with a hearing aid. On all devices, there's also an additional Rotor option (under VoiceOver) for Punctuation, and the White On Black setting is now more accurately called Invert Colors. In a small, but welcome, addition, the slider that controls the volume balance between the left and right channels now has a mark indicating the center.
Under the Physical & Motor section in Accessibility, there's a new setting that lets you choose how quickly you need to double-press or triple-press the Home button for it to register as a single action, rather than separate presses: Default, Slow, or Slowest. And the Triple-click Home setting now allows you to choose a single action (Guided Access, VoiceOver, Invert Colors, Zoom, or Assistive Touch) to occur, or to choose multiple options that will appear in a menu when you perform a triple-press. Finally, on iPhones, the Custom Vibrations option has been removed; as noted above, you can now create custom vibration patterns in the Sounds screen.