Question: Apple recently released a new version of iTunes Connect.
I just want to change the primary language of my app, but the documentation (<https://developer.apple.com/library/ios/documentation/LanguagesUtilities/Conceptual/iTunesConnect_Guide/Chapters/DisplayInMoreLanguages.html> at the bottom) is now deprecated.

Anyone solved this problem?

[![enter image description here](https://i.stack.imgur.com/55D9K.png)](https://i.stack.imgur.com/55D9K.png)

Answer: 
I was able to change the primary language after being accepted by the appstore. 

Despite what the documentation says, it seems that changing the primary language is impossible in "Prepare for submission" state.
For those still having problems changing your primary language, you first need to submit a new version of your app which has at least 2 localizations (for me e.g. i started only with german and then german and english). German was my initial primary language.
As soon as the version is approved + ready for sale(dont forget to add the localization in your App-Information as well (add new language)) THEN you can change the primary language in the App information.

Sorry for my english, new here ;)