| 8 Altaic | 8.1.1 Early Middle Japanese to Modern Japanese | au iu uu eu ou → ɔː juː uː joː oː
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| 10 Austronesian | 10.2.6.1 Proto-North Sarawak to Kiput | ai au → ai̯ au̯ / _#
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| ai au → ɛː ɔː / _…#
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| 10.3.5.8 Proto-New Caledonia to Proto-Yunaga | au ai → ɔ ɛ
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| 10.3.11.1 Proto-Southern Vanuatu to Anejom | au → {u,o} “sometimes”
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| 10.3.12 Proto-Oceanic to Vera’a | a(C)i a(C)u → {a,ɛ}(C) {ɔ,a,ɛ}(C)
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| 17 Indo-European | 17.5.1 Proto-Indo-European to Old Irish | {au,eu,ou} → oː
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| 17.5.2 Proto-Celtic to Middle Welsh | {au,eu,ou} → ∅
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| 17.7.2.1 West Germanic to Anglo-Frisian | ai au eu → {eː,aː} aː ia
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| 17.7.2.1.9 Early Northern Middle English to Scots | — ai oi ui ei au ou iu ɛ(o)u → eː oe əi iː {ɑː,ɔː} ʌu ju j(ʌ)u
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| 17.7.2.2 West Germanic to Old Low Franconian | ai au → eː oː
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| 17.7.2.5 West Germanic to Old Low German | ai au → eː oː
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| 17.7.3 Common Germanic to Proto-Norse | o(u) {ɔ,ɑ,au,ai,æ} {ja,jE,æ(i),e(i),y} → u a i
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| 17.7.3.1 Proto-Norse to Old Norse | u {o,ɒ} a au juː → y ø æ y yː / _(C)(C)(C)j
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| {(j)u,we}ː {o,ɒ}ː aː au → yː øː æː æy
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| u {o,ɒ} a au juː → y ø æ æy yː / _(C)(C)(C)i
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| {u,we,wi} {o,ɒ} a au juː → y ø æ æy yː / _(C)(C)(C)i
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| au {ai,ey,ei} æ{y,i} øy Vː → o e æ ø V / #(C)(C)(C)_CC
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| u {o,ɒ} a au juː → y ø æ æy yː / _(C)(C)(C)j
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| u {o,ɒ} a au juː → y ø æ æy yː / #(C)(C)_ʀ
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| {æ,e}i ai au w{ɪ,i} wy wV iu Vː → eː aː oː weː woː wVː eː oː V
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| au → ɒ / j_
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| 17.7.3.1.2 Old Norse to Orkney Norn | au → (ɔ)u
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| 17.7.3.1.3 Old Norse to Shetland Norn | au → {o,ɔ,ɒ} / j_
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| au → j{o,ɔ}
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| 17.9 Proto-Indo-European to Hittite | {uː,eu,au} → u
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| 17.10.1.1 Proto-Indo-Aryan to Central Middle Indo-Aryan | a{i,j}(a) a{u,w}(a) → e o
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| 17.10.1.2 Proto-Indo-Aryan to Eastern Middle Indo-Aryan | a{i,j}(a) a{u,w}(a) → e o
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| 17.10.1.3 Proto-Indo-Aryan to Northwestern Middle Indo-Aryan | a{i,j}(a) a{u,w}(a) → e o
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| 17.10.1.4 Proto-Indo-Aryan to Western Middle Indo-Aryan | a{i,j}(a) a{u,w}(a) → e o
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| 17.10.1.5.1 Vedic Sanskrit to Classical Sanskrit | au aːu ai aːi → au oː ai eː / ! _V
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| 17.11 Proto-Indo-European to Proto-Slavic | {a(ː)u,o(ː)u} e(ː)u → u ju
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| 17.12.1.1.2 Latin to Catalan | au → a / _%”u
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| ae au → e ɔ / stressed
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| ae au → e o / _%”V
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| 17.12.1.1.3 Latin to French | (ɛ)au → ɔ
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| 17.12.1.1.4 Vulgar Latin to Italian | au → u / #_ (sporadically, e.g. audire → udire)
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| au → o
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| 17.12.1.1.5 Latin to Portuguese | au → a / _%”u
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| au → o
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| 17.12.1.1.6 Vulgar Latin to Old Provençal | — au → a / _(C…)u
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| 17.12.1.1.9 Latin to Sardinian | au ai → o e
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| 17.13.1 Proto-Tocharian to Tocharian A | {a,ɛ}u əw → o u
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| 17.13.2 Proto-Tocharian to Tocharian B | {a,ɛ}u əw → au u
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| 21 Lakes Plain | 21.2.1.2 Proto-Central Tariku to Iau | au → ɔ
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| 38 Tai-Kadai | 38.1.1.3.1 Central Tai to Lungchow | {uəi,uai} iau → uːi eːu
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| 38.1.1.4.2 North Tai to Po-Ai | uəi uai iau → iː oːi eːu
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| 38.1.1.5.4 Southwest Tai to Siamese | ɨ̯əu au → au aːu
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| 42 Uralic | 42.1.2 Proto-Finnic to Livonian | ɑː au → ɔː ɔu (though sometimes ɑː develops, apparently at least partially due to metathesis?)
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| 46 Vowel Shifts | 46.5 Old English-to-Scots Vowel Shifts | ai oi ui ei au ou iu ɛ(o)u → eː oe əi iː {ɑː,ɔː} ʌu ju j(ʌ)u
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| 46.8 Greek Vowel Shift | ɛu au → ɛv av
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