phrase/ˌdonde ˌdixe ˌdiɡo | ˌdiɡo ˈdjeɡo/
a phrase used by the speaker when rectifying something they had previously said, claiming it was mispronounced or misinterpreted, or because they changed their opinion; to take back, to retract; move the goalposts
Literally, “where I said 'I say', I say 'Diego'”. It is a play on words.