This article explains how to change the default keyboard on iPad devices running iOS 11 and later. Settings you can change include the keyboard layout, keyboard type, predictive text, and autocorrect.
How to Change Your iPad Keyboard (Tutorial)
To adjust your keyboard settings, go to the Settings app. Here's what you need to do:
Open the Settings app on your iPad.
From the menu on the left, select General to display general device settings on the right side of the screen.