Cocoa Programming for OS X: The Big Nerd Ranch Guide

Localizing String Literals

What about the places in your application where you programmatically determine what text is displayed to the user, such as with a string literal or a Swift string interpolation? In Document.swift, you have the following line of code:

let alert = NSAlert()
alert.messageText = "Do you really want to remove these people?"
alert.informativeText = "\(selectedPeople.count) people will be removed."
alert.addButtonWithTitle("Remove")
alert.addButtonWithTitle("Cancel")

That alert sheet is not going to bring about world peace.

You have already created a strings file to localize Document.xib. In addition to any strings files you may have for XIB files, you will want to create a strings file for strings that are ...