Setting preferred language order on iPhone

As of at least iOS 8 you can change the order of languages in Settings > General > Language and Region under the heading Preferred Language Order.

iOS Language and Region Settings


AFAIK, in iOS7, English is not forced as 2nd language. So, you can sort 2 or more locales freely.

Just select a language and add it. Repeat for each desired language in reversed order (from low to high preference)