The Sindarin language created by J. R. R. Tolkien has mutation patterns inspired by those of Welsh.
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The philosophical Ithkuil language features a complex mutation pattern, with every root consonant having eight possible mutations of its base form.
mutation | Retroflex consonant | Fricative consonant | Mutation | consonant | click consonant | BRCA mutation | coronal consonant | The Next Mutation | Tenuis consonant | stop consonant | Mutation rate | High German consonant shift | Glottal consonant | Germanic a-mutation | Dorsal consonant | Dilute budgerigar mutation | Coronal consonant | Click consonant | ''BRCA'' mutation |