How do I remove an added language form the "Preferred Language Order" in Settings > General > Language & Region > Preferred Language Order?
iPhone 6 Plus iOS 8.4.1
Tap on edit on the top right of the screen:
Then tap on the minus sign that will appear to the left of each language you want to remove
You can also rearrange the languages by dragging them; that will change the language in which apps and websites present themselves -as it says underneath:
Apps and websites will use the first language in this list that they support.