Adding or deleting languages in Settings
The keyboard is automatically set to the same language as the system language. The keyboard language can be changed manually without affecting the system language.
Tap 
at the bottom of the center display.
at the bottom of the center display.Tap System, Languages and input, Keyboard.
Select one or more languages in the list.
It is now possible to toggle between the selected languages using the keyboard.
If no language has been selected under Settings, the keyboard will remain in the same language as the vehicle's system language.
Toggling between keyboard languages
If more than one language has been selected in Settings, the button in the keyboard can be used to switch between the different languages.
To toggle between keyboard languages from the list:
Press and hold the button.
A list will appear.
Select the desired language. If more than four languages have been selected, you can browse through the list shown on the keyboard.
The keyboard and word suggestions will be adapted to the selected language.
To change keyboard language without displaying the list:
Tap the button.
The keyboard layout will change to the next language in the list without displaying the list.