You're my heroes of the month! Finally, I have a way to reliably reproduce the issue. I agree with your assessment. Very well-written post and analysis btw. Let's hope it provides the necessary information to the Apple engineers to fix it!

This might fix the problem for you as the developer once, but you don't wanna tell all your users to restart their phone every time this happens. ;) I have the same issue, but it happens very rarely which makes it almost impossible to debug.

@Developer Tools Engineer Thank you very much for sharing this. But this should either be fixed (so that Xcode automatically creates the en.lproj folder if that language is added to the String catalog, regardless of whether there are any keys translated to non-default values) or at least documented somewhere in the official documentation. It took me days to figure this out. I haven't seen this requirement mentioned anywhere else, and it's also not explained in the respective WWDC video.

Thank you for sharing! Did Xcode automatically add the NSAlarmKitUsageDescription key to you InfoPlist.xcstrings file (as it should, but didn't in my case with Xcode 26.0.1)? And if so, which Xcode version did you use?

Thank you for sharing! Which Xcode version did you use and was the NSAlarmKitUsageDescription key added automatically in the InfoPlist.xcstrings file during the build? It should, but wasn't in my case (Xcode 26.0.1).