You can have multiple languages on your device or you can change the main language on your device.
1.
From within the Settings app, scroll to and tap General.
2.
Scroll to and tap Language & Region.
3.
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.
4.
Select a language.
5.
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.
6.
You've completed the steps!
