10 Austronesian | 10.3.11.1 Proto-Southern Vanuatu to Anejom | ei → i
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17 Indo-European | 17.2 Proto-Indo-European to Common Anatolian | ei eu → ɛː uː
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17.5.1 Proto-Indo-European to Old Irish | ei → eː
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17.5.2 Proto-Celtic to Middle Welsh | ei → eː
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17.6 Proto-Indo-European to Dacian | ei → {ei,i} (“PIE *ei evolution is not well reconstructed yet”)
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17.7 Proto-Indo-European to Common Germanic | ei oi → iː ai
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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 | ei ou → eː oː (except in southeastern dialects; *ei as a result of the umlaut of *ai was not affected)
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17.7.2.3 Middle High German to Standard German | ou øy ei → au oy ai
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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 | a(i) {e,w{æ,i}} {we,ei} (w)ɪ → ey ø y ʏ / w_ ! hw_
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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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{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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e(ː){B,i(ː)} → e(ː)u / {v,w}_
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17.7.3.1.2 Old Norse to Orkney Norn | ei → eː / _C(ː,V)# (V can be a syllabic consonant)
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17.11 Proto-Indo-European to Proto-Slavic | e(ː)i → i
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17.12.1.1 Proto-Indo-European to Latin | ai → ei → iː / %(C)(C)_ when unstressed
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ei oi ou → iː eː uː / %(C)(C)_ when unstressed
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{ai,ei,oi} → ei → iː / _(C)(C)#
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17.12.1.1.3 Latin to French | {ei,ɔi} → oi / C[-nas]
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30 Niger-Congo | 30.3.1.1.3 Proto-Gbe to Proto-Fon | oi ɔi ɔ̃i {a,ɛ}i {ɛ̃,ẽ}i ei → oe ɔɛ ɔ̃ɛ̃ ɛɛ ɛ̃ɛ̃ ee
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38 Tai-Kadai | 38.1.1.3 Proto-Tai to Central Tai | ɛi ei → ai iː
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38.1.1.4 Proto-Tai to North Tai | ɛi ei → ai əi
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38.1.1.4.2 North Tai to Po-Ai | {əi,ɛi,ei} → ai
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{ɛi,ei} → ɨː
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38.1.1.5 Proto-Tai to Southwest Tai | ɛi ei → ai iː
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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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46.10 Late Proto-Finnic to Savonian Vowel Shift | ei oi øi → eː oe øe
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