Plugged in new iPhone - iTunes is now using a foreign language
A similar case to what you are experiencing can be found here:

https://discussions.apple.com/thread/3303287?start=0&amp;tstart=0

Pretty weird stuff, but apart from restarting the computer you can try purchasing a free app (I assume through iTunes on the computer), another suggestion that I have read resolved this was to unplug the iPhone and do a reset (hold down the home and lock buttons until the apple logo appears) and then plug it back in when prompted.