We learn to localize the storyboard or xib.
First, create your application, then go to Project – Info – Localizations, click on + and add the languages you need (Pic 1), when adding, you can check which objects you want to apply localization to.
Next, next to your storyboard or xib, you will see a down arrow, expand the list, and you will see that the strings file (the specified language) has been added and it lists all the text that is in the storyboard (Pic 2).
You can select all languages in the Inspector panel, when you select other languages, you also create strings files, edit the text and ready, your storyboard or xib will be localized by the selected languages (Pic 3)! ????