After updated to Swift 4.2 I tested new app version on iPhone where is a main language is Russian. Region is also Russia, but app using English Interface builder storyboard (Base). Even I have Russian one.
I also have Localizable strings for UIAlertController.
And it works. I mean, when I use my app on my iPhone (Russian language. Region is Russia) then I see English Interface builder storyboard, but alerts on Russian.
I didn't set language in scheme.
I even created new project there made 2 languages. Same problem.
Help me please where is a problem. Why iOS doesn't wanna see necessary Interface builder storyboard