

You can just feel your way around. If all the buttons have the same shape, sure, you can’t, but they don’t have the same shape. For example, if one button has a little raised nub, like the F key in keyboards, you know immediately which button your finger is on.
Language is not controlled by dictionary writers. Dictionaries are descriptive only, they just list what words people are already using. In some countries, central organizations do try to be prescriptive and decide how the languages should be spoken, but that doesn’t usually work.