He said I’d learn alot
Dwedodd e bo fi’ di dysgu llawer
I said
Dwedodd e bo dw i ‘di dysgu llawer
He said I’d learn alot
Dwedodd e bo fi’ di dysgu llawer
I said
Dwedodd e bo dw i ‘di dysgu llawer
The ‘bo’ for ‘that’ here is ‘bod’, and ‘dw’ is also a form of ‘bod’, and you don’t get two 'bod’s next to each other, so it has to be bo+pronoun.