How do you say thank for all your good wishes in welsh?

There are a few ways to say "thank you for all your good wishes" in Welsh, depending on the formality and the context:

Formal:

* Diolch yn fawr am eich dymuniadau da iawn. (This is a very formal way to express your gratitude.)

Informal:

* Diolch yn fawr am eich dymuniadau. (This is a more casual way to say thank you.)

* Diolch am eich dymuniadau da. (This is a good option for friends and family.)

* Diolch am eich holl ddymuniadau da. (This is another way to express gratitude for the many good wishes you've received.)

Adding a personal touch:

* Diolch yn fawr am eich geiriau caredig. (Thank you very much for your kind words.)

* Mae'n golygu llawer i mi. (It means a lot to me.)

You can also use a phrase like "Rwy'n gwerthfawrogi hynny'n fawr" (I appreciate that very much) to express your gratitude.

Remember that the best way to express your thanks will depend on the specific situation and your relationship with the person you are speaking to.