| | Finn. | Seto | Er. | HMr | MMr | Ud. | Hun. | SMn | SKh | VKh | Nga. | Ka. |
| F/B | 0 | 0 | 1 | 0 | 0 | 0 | 3 | ? | 2 | 0 | 0 | 0 |
| R|T | — | — | — | — | 0 | — | 1 | ? | — | — | 5 | — |
F/B: front/back harmony
R|T: rounding, total harmony
—: not applicable
- Erzya
-
/o/ : /e/ (difference in rounding)
- Hungarian
-
F/B harmony: /ɑː/ : /eː/, /o/ : /ɛ/ (difference in height), /ɒ/ : /ɛ/ (difference in rounding – which can be analyzed as phonetic, not phonological). Rounding harmony: /ɛ/ : /ø/ (difference in height)
- Nganasan
-
In addition to the fact that /u̯ɑ/, although it belongs to the rounded class of vowels, is phonetically unrounded, all of its actual alternations (and almost all of those of /u̯ɑ/) are non-potential, since they alternate with high vowels, and some of these alternations are monophthong : diphthong alternations (i : ɑ, ɨ : ɑ, i : u̯ɑ, ɨ : u̯ɑ, i̯ɑ : ɑ).