How would you say with all my love in Welsh?

There isn't a direct translation for "with all my love" in Welsh, but you have a few options depending on the context and formality:

Informal:

* Gyda'r holl gariad i ti: Literally "With all the love to you"

* Gyda chariad mawr: "With great love"

Formal:

* Gyda chariad dyfnaf: "With deepest love"

* Gyda chariad llawn: "With full love"

You can also use a more specific phrase depending on the recipient:

* Cariad at ti'n fawr: "Great love to you"

* Cariad mawr i'r teulu: "Great love to the family"

The best choice will depend on the person you are writing to and the tone of your message.