I need to develop an app for the japanese market, with additional suppoert for a small number of english speaking users.
The storyboards will be created in Japanese, and at a later stage exported as .xliff for translation into english.
I can not afford to develop the UI in English, and transalte it to Japanese afterwards (the development team is Japanese), so I have a setup where the "Base" localization is assumed to be Japanese, and English is at most another localization:
In Project Settings > Info, I have
Localizations
Language Resources
English - Development Language 3 Files Localized"alone, and "Use Base Localizations" checked.
I created the storyboards for the Base localization in Japanese, and added corresponding .strings files for English.
The target's Info.plist specifies "Localization native development region" as "Japan".
When I set the language of my iPhone 5s to English and launch the app, it shows the English label. If I change the device language to Japanese and re-launch the app, it displays in Japanese as expected.
However, if I try the Simulator (iPhone 5, iOS 9), the user interface (UILabel in storyboard) appears with the English text, even if the Simulator is set to Japanese.
Perhaps I am approaching this with the wrong setup, but it does work on the device...
