There is evidence in French and Spanish that the monophthongization of au occurred independently in those languages. |
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In some languages, due to monophthongization, graphemes that originally represented diphthongs now represent monophthongs. |
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Many diphthongs had begun their monophthongization very early. |
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Monophthongization or smoothing is a vowel shift in which a diphthong becomes a monophthong. |
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