You may have accidentally added a wrong keyboard or you may have no need for your international keyboard and you want to turn off a keyboard. Although adding a new keyboard is pretty straight forward, deleting is not. To disable an international keyboard that you added, tap Settings > General > International > Keyboards. There is an Edit button on the upper right corner. Tap on that and red circles will appear next to each keyboard name. Tap on the circle that is next to the keyboard that you want to get rid of and a “Delete” button will appear so that you can delete it.