| 6 Afro-Asiatic | 6.2.2.1.14 Classical Arabic to Moroccan Arabic | ə → ɪ / else
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| 10 Austronesian | 10.1.2.7.1 Proto-Kalamian to Agutaynen | aɪ ai → ɪɪ ii (not sure if there’s a long vowel or hiatus here)
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| 10.1.2.7.2 Proto-Kalamian to Karamiananen | aɪ ai → ɪɪ ii (not sure if there’s a long vowel or hiatus here)
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| 10.1.2.7.3 Proto-Kalamian to Kalamian Tagbanwa | aɪ ai → ɪɪ ii (not sure if there’s a long vowel or hiatus here)
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| 10.3.2 Proto-Oceanic to Hiw | {e,i} → ɪ (sporadic)
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| 10.3.3 Proto-Oceanic to Lemerig | o e → ʊ ɪ
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| ia → ɪ “(only somoetimes?)”
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| 10.3.4 Proto-Oceanic to Mwotlap | o e i → ɔ ɛ ɪ / C_V[- high]
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| o e → ʊ ɪ
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| aCV[+ high] → ɪ / when stressed unless primarily stressed
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| 10.3.12 Proto-Oceanic to Vera’a | i(C)V[- high] → i(C)ɪ
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| o e → ʊ ɪ
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| 17 Indo-European | 17.7.2.1.4 Midlands Middle English to Early Modern English | əɪ əʊ → aɪ aʊ / “in most of Britain”
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| eː oː → eɪ oʊ / ! _ɹ
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| 17.7.2.1.5 Early Modern English to American English | i u e → ɪ ʊ ɛ / _ɹ
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| iə → ɪ (ongoing)
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| 17.7.2.1.6 Early Modern English to Australian English | ɜːɹ ɑːɹ ɔːɹ eːɹ oːɹ iːɹ uːɹ → ɜː ɑː ɔː ɛə ɔə ɪə ʊə / syllable-finally
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| oʊ iː → ɔʊ ɪə / _ɫ
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| oʊ iː → əʊ ɪi / else
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| ə → ɪ / _{k,ɡ,tʃ,dʒ,ʃ,ʒ,v}
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| 17.7.2.1.7 Early Modern English to British English | ɜːɹ ɑːɹ ɔːɹ eːɹ oːɹ iːɹ uːɹ → ɜː ɑː ɔː ɛə ɔə ɪə ʊə / syllable-finally
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| 17.7.2.1.9 Early Northern Middle English to Scots | — əi → aɪ / _{r,F[+voiced],$,#} (pursuant to the above)
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| 17.7.2.1.10 Old English to Scots | ø → ɪ
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| {y,i} → ɪ
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| ʌ → ɪi (sporadic)
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| a → ɪ / “unstressed and/or final”
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| 17.7.3.1 Proto-Norse to Old Norse | i → ɪ / _NS[- voice] ! _NS(C){o,i,j}
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| 17.7.3.1.1 Old Norse to Early Icelandic | u o a øː eː y i → ʏɪ oi ai øi ei yː iː / _j
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| u oː aː ʏɪ {y,i} {y,i}ː æː eː ey → ʏ ou au ai y ɪ i je ei
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| 17.7.3.1.2 Old Norse to Orkney Norn | u a e eː → ʌ ɑ ɪ ɛ / _Cː
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| ɒ → ɪ / _rC
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| y → {ɪ,i}
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| i → ɪ / _CC
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| 29 Na-Dene | 29.1.1.1.4 Proto-Athabaskan to Chilcotin | e {ɑ,ə} → i {e,ɪ}
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| 30 Niger-Congo | 30.1 Proto-Potou-Akanic-Bantu to Proto-Bantu | i ı̃ V[-round] → uɪ uɪ̃ V[+round] / Cʷ_
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| 37 Siouan-Iroquoian | 37.1.2.5 Proto-Northern Iroquoian to Seneca | — a e o → ə ɪ ʊ / C_{C,i[-long]}
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| 44 Vasconic | 44.2 Proto-Basque to Basque | hu hi → ʊ ɪ / {o,e}_ (also happened with /a/ sometimes, but usually such sequences just dropped one vowel)
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| aɪ → eɪ → e (rare)
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| aʊ → aɪ / !_{ɾ,r,s̺,s̻} (Souletin, Roncalese)
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| oɪ → uɪ (rare)
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| 46 Vowel Shifts | 46.2 California Vowel Shift (English) | æ → {eə̯,ɪə̯} / _N
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| 46.5 Old English-to-Scots Vowel Shifts | — əi → aɪ / _{r,F[+voiced],$,#} (pursuant to the above)
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| 46.12 Northern Cities Vowel Shift (English) | ɪ → ɪ̞
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| 46.19 Southern [United States] Shift (English) | ɛ → ɪ / _N
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| æ ɛ ɪ → æj(ə) ɛj(ə) ɪj(ə)
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| ɛj(ə) ɪj(ə) i eɪ → ej(ə) ij(ə) ɪi ɛi
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| æ/ɑː → æɪ
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