From within the Settings app, scroll to and tap General.
Scroll to and tap Language & Region.
Tap Add Language...
You can enable a previously added language from this screen by dragging it to the top of the list using the handle on the right.
Select a language.
Select your new language to enable it immediately.
Your device will fade to black for a few seconds, then fade back with the selected language enabled.
You've completed the steps!
