With the introduction of iOS 9, Apple has changed the way the operating system identifies languages. Because of this fact, the app trekking-etc/viewer now displays the content in English, despite the fact that the phone is set in Italian.
We regret this inconvenience, which is not due to a defect of our app, but to a change in operating system behavior, compared to previous versions.
For those interested in the technical side, here is the article in which Apple itself announced that it has changed the value that a specific operating system interface provides when used to determine the language setting on the phone:
We will try to fix the problem as soon as possible; in the meantime, our advice is NOT to upgrade your iPhone to iOS 9. By the way, our app may not be the only one to suffer from this problem.
■ gb, 2015-10-22