Changing language through settings real IOS devices

Hi,
I would like to change languages through the settings on real iOS devices, I found this on the appium google group:
https://groups.google.com/forum/#!topic/appium-discuss/7LS2Y-E7pfg

Is that correct that is not possible to automate build-in app in iOS with Appium, in this case launching “Settings”

Thanks,
Anna.