Do You Know How to Do It for Vowels or Consonants?

You can also do it for consonants. There are certain features that vowels and consonants share. One of them is- That's that kind of? Yes. And so for example, you could have a fairly plausible harmony rule where an S will make a chia into an S or vice versa. But usually the place where you see consonant harmony is civil and consonant harmony. So that they're all the same in a word.