Mutations in Welsh
The beginning of a word can change (mutate) depending on what goes before. In Welsh there are three mutations:
1. Treiglad Meddal – soft.
Applies to words beginning with the letters T C P B G D Rh M Ll.
2. Treiglad Trwynol – nasal.
Applies to words beginning with T C P B G D.
3. Treiglad Llaes – aspirate.
Applies to words beginning with T C P.
Some people use rhymes to help them to remember which letters are affected. The one I learnt is: “TCP Blinking Good Disinfectant. Rhiannon Married Llewellyn.”
I like to compile my own crib sheets with information drawn from various sources. The one for mutations can be downloaded from the Document Download page or by clicking this link. I guess it does not contain every mutation possible.