in English is:

isomorphism

Mutations

Soft:(no mutation)
Nasal:(no mutation)
Aspirate:(no mutation)

Use

yr isomorffedd hwn
fy isomorffedd i
dy isomorffedd di
ei isomorffedd ef/o
ei hisomorffedd hi
ein hisomorffedd ni
eich isomorffedd chi
eu hisomorffedd nhw/hwy
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