"Good night, Dewi Lingo."
Translation:Nos da, Dewi Lingo.
iirc from Welsh lessons in school, the correct spelling/ pronounciation would be Nos dda, dd pronpunced almost but not quite like "th"
This is due to mutations to letters in Welsh to make words easier to say.
E.g. I live in Wales - Dw i'n byw yn Cymru becomes - Dw i'n byw yn Nghymru which is easier to say when speaking quickly. (nghymru is said numb-ree)