There must be some rules that determine which set of localized strings of an Apple Wallet pass (.pkpass) is used when the choice is not obvious. For instance, I made a pass with localization folders ko.lproj (Korean) pl.lproj (Polish) zh-Hans.lproj (Chinese). If any of these languages is in my iPhone's preferred languages (Settings... General... Language & Region), then it's easy: the first one on that list is used. But what if the list does not have any of them? When I try, it seems the Chinese localization is chosen by the Wallet app. Without the Chinese localization folder, it is Korean. If I also add ar.lproj (Arabic) then Arabic is chosen. I can't discern any system here. How does Wallet choose the default localization?