If you say “afters” to mean dessert or pudding…

[BottleBlondeMachiavelli]

….where are you, your parents and/or grandparents from?

Is it a class thing, or a regionalism, or fairly neutral?

Pudding for us. Which I used to think was the 'common' word and dessert was the posh one.

Op asked about it in connection with class.
Saying a word denotes a particular class does not mean you think that class is "better", it's just a statement of fact about how language is used.

We said afters or pudding. Desert was what we had if we had a posh meal out. Parents were from Lancashire and Essex and both said the same.

My parents were from North East Scotland and said afters.

It was always pudding where I grew up on the Isle of Wight.

Breakfast
Lunch
Dinner
Supper

Tea was an actual cup of tea.

Ideally yes, but in practice people do judge others who use different language to them.

And the judgement goes both ways. As a young very MC/upper MC girl i was sent to brownies in the village and I have never forgotten the teasing and comments from the leaders. The other girls were accepting of me but some of the leaders were horrid. They mocked the way I spoke and the words I used.

From Devon and call it afters.

In Ireland afters is the evening invitation to a wedding after the meal and not the main event or the hospitality after a funeral.

Dessert is what's said here, I cannot recall anyone saying afters and the occasional time I've heard pudding it's English people saying it. Here when pudding is mentioned it's in reference to specific desserts such as chocolate, sticky toffee or Christmas/plum pudding.

South East. Afters or pudding - but never dessert.

That’s awful.

Always afters. South East London with East End grandparents

Afters- south wales

Saying pudding makes me cringe

Liverpool working class and we always said ‘afters’