To change to Norwegian keyboard, you need to:

1. Go to Settings > General > Keyboard.
2. Tap “Keyboards” and then “Add New Keyboard.”
3. Select “Norwegian” from the list.
4. When typing, you can switch between languages by tapping and holding on the icon to reveal the keyboard language menu¹.

Alternatively, you can set the keyboard to Norwegian at "START, Settings, Devices, Typing, Advanced keyboard settings"². You can also choose a toggle key by clicking the Language Bar Options button at the bottom². Pressing Esc on your keyboard has the same function³. Press Shift or either Ctrl + Alt or AltGr for additional Norwegian letters that are not visible on the keyboard³.