When writing Derani, we could get rid of the diphthong mark (◌◌), and instead reuse more consonant glyphs to write falling diphthongs.
| Official | Reform | Mnemonic |
|---|---|---|
| aı | aı / d | "High" spiral |
| ao | ao / p | a with a tail |
| eı | eı / z | e with an ı flourish |
| oı | oı / nh | "Low" spiral |