in English is:

Malthusianism

Mutations

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

Use

y Falthwsiaeth hon
fy Malthwsiaeth i
dy Falthwsiaeth di
ei Falthwsiaeth ef/o
ei Malthwsiaeth hi
ein Malthwsiaeth ni
eich Malthwsiaeth chi
eu Malthwsiaeth nhw/hwy
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