I don't think I would ever have thought this expression meant "bonfire" except that the Tips and Notes put the connection into my head by telling me that it doesn't... and now I keep getting it wrong.
This expression is for the 'fireworks, not the bonfire. It is literally 'wild fire' which I'm sure you'll agree is a great description of fireworks.
Bonfire is 'coelcerth'
Nov 5th in Welsh is 'Noson Tân Gwyllt' = Firework night
"This expression is for the 'fireworks, not the bonfire." - I know, that's what the Tips and Notes point out. I just keep getting it confused because I remember the one it's not supposed to be rather than the one it is.
"It is literally 'wild fire' which I'm sure you'll agree is a great description of fireworks." Oh, that's helpful and will surely help me remember it - thanks. I'd wondered what the "gwyllt"
"Bonfire is 'coelcerth'" - thanks.
"Nov 5th in Welsh is 'Noson Tân Gwyllt' = Firework night" Ah, so that's why there was a note about "Tân Gwyllt" not meaning "bonfire" - because that night is called "Firework Night" in Welsh rather than "Bonfire Night." It might help if that were spelled out a bit more in the Tips and Notes.
We do around here... in Somerset you'll hear people speak of "fireworks night".
We say Bonfire night and sometimes Fireworks night.
I wonder what the word for 'a wildfire' is yn Cymraeg?
I also mentioned bonfire, simply because it is what was mentioned as the translation when I hovered on the words in the previous entry, where I came across it for the first time. Would be better to change that, it puts the learners on the wrong foot.
The way I see it, there are three names for 'Bonfire Night' that you could make from Cymraeg - one that is actually used, and two others that are just theoretical:
Noson Tan Gwyllt - Wild Fire Night
Noson Coelcerth - Literally Bonfire Night
Noson Tan Esgyrn - Bone Fire Night
Fun fact: the bon in Bonfire Night actually comes from the word 'bone' - and not from the French bon meaning 'good' as I used to think - because it specifically refers to a fire in which bones are burnt.