Add two labels on the view of MultipleLanguageAppViewController.

Add two folders to the project. Name them en.lproj and es.lproj, respectively.

Add a plain text file in the en.lproj folder and name it Localizable.strings. Enter the following in the file and save it:

// Localized output on MultipleLanguageAppViewController
"Have a nice day!" = "Have a nice day!";

Add another plain text file in the es.lproj folder and name it the same as before: Localizable.strings. Enter the following in the file and save it:

// Localized output on MultipleLanguageAppViewController
"Have a nice day!" = "¡Qué tenga un buen día!";

Enter the following code in the MultipleLanguageAppViewController class:

public override void ViewWillAppear (bool animated)
{...