Editing Gallo language (section)

=== Diphthongs ===
Gallo has diphthongs, just like Latin itself, other langues d’oïl, and other Romance languages. Diphthongs in Gallo generally use the semi-vowels [w] and [j], more rarely [ɥ]: [wa], [wə], [wi], [aw], [ja], [ju], [aj], [ej], [ɛ̃i], [ɥi], [ɥɛ̃], [ɥə], etc.<ref name=":2" /> The triphthong [jaw] is also used.<ref name=":5">{{Cite book |last=Tréhel-Tas |first=Nathalie |title=Parlons gallo: langue et culture |date=2007 |publisher=l'Harmattan |isbn=978-2-296-03247-7 |location=Paris}}</ref>

The very common diphthong [aw] most often is the result of the disappearance of a consonant that existed in Latin. For example, ''fagu'' ("beech") became ''fao'', and what once was two consecutive, separately pronounced vowels, [fau], has become a diphthong: [faw]. In some words, such as ''talpa'', the [l] became a vowel, [u], and then [w], so [al] thus became [aw]: [tawp], while in French, the [al] merged into [o]: taupe [top]. In northern Upper Brittany, diphthongs are used to express plurals: un martè [maʁtə], des martiaos [maʁtjaw]. In Loire-Atlantique, only the plural form is used.<ref name=":2" />

The nasal diphthong [ɛ̃ɔ̃], heard for example in ''grand'' ([gʁɛ̃ɔ̃] "great") is typical of western langues d’oïl and is also found in [[Norman language|Norman]], [[Poitevin–Saintongeais|Poitevin-Saintongeais]] and [[Angevin dialect|Angevin]], sometimes in slightly different forms ([aɔ̃] in Saintongeais, [ɛ̃ɑ̃] in Norman).<ref>{{Cite web |title=Langues d'oïl |url=http://corpusdelaparole.huma-num.fr/spip.php?article39 |url-status=dead |archive-url=https://web.archive.org/web/20160303183918/http://corpusdelaparole.huma-num.fr/spip.php?article39#federation=archive.wikiwix.com&tab=url |archive-date=3 March 2016 |website=Corpus de la parole |access-date=9 December 2023 }}</ref>