Problem: Incorrect Letters appear when keys are pressed.
A Chromebook sometimes says "CO" on the bottom right, instead of "US". When you see this, it means the Chromebook Keyboard has been changed from the US Standard keyboard to the Colemak keyboard. When this happens, some of the keys will not make the letter/symbol you expect to appear.
Solution:
There are 2 solutions to the above problem.
Change via Keyboard Shortcut:To change the Chromebook keyboard back to US settings, press Ctrl + Spacebar. This keyboard combination is used to switch back and forth between US and Colemak keyboards.
Change via Language icon:
Click the picture in the bottom right-hand corner of your Chromebook screen(1) and click the icon that says “Keyboard ▼”
(1) 
Under the options here, switch back to the US keyboard.
