These are the lesson notes for this day. Its build-along tutorial and flash cards have not been written yet.
String literals in Text, Button, and similar views are localizable automatically. Xcode collects them into a String Catalog (a .xcstrings file), where you add translations and plural forms. Use formatters for numbers, dates, currency, and measurements so that they follow the user's locale. Your layouts have to tolerate longer text — German runs about 30% longer than English — and right-to-left languages, which SwiftUI mirrors for you provided you use leading and trailing rather than left and right.
Add a second language to one screen using a String Catalog, including one plural. Preview the screen in that language, and in a right-to-left pseudo-language.
After this lesson you should be able to answer.leading rather than .left?