To not want to cook a full foreign Christmas spread for people I’ve only met once?

And he sounds yet worse again. Quite a feat considering he sounded like a total asshole in your OP.
Line in the sand time. No, you won't be cooking specific meals from his country on Christmas day. You will eat them if he cooks them. No, he won't be inviting people to your home for Christmas again, deliberately using a language you don't speak, without full discussion with you first. Decide if you're happy for them to come if he does all the work, but make it clear that you don't expect to be pushed out by language in your own home. So, maybe yes they are welcome now he's invited them but no you won't be prepping the guest rooms, obviously he will be doing that for his guests.
Make it crystal clear what you will accept here and what you won't. If you're on Threads look out for the 'Sherlocked' posts, full of women finally pushing back after years of 'so I'll just have to do X' from shit husbands expectations. Join them.

I must admit, my heart sank when I read you were pregnant.

It's out of order for anyone to invite others for Christmas without first discussing it with the rest of the household. For that, your boyfriend is a prick.

As for him expecting you not only to host in this scenario, but to cook food that you've never cooked before, and don't know much, if anything about, as it's literally foreign to you, well, that just shows you what an utter selfish, sexist, horrible man this is.

He's moody, sulky, treating you like a live in maid. Nah, I know you're pregnant, but I'd be off to my parents for Christmas and re-evaluating this relationship.

You'll be better raising this baby alone, rather than raise it with this selfish, misogynist of a man.

Nailed it

Tell him you will host them but they have to bring the food. You don't know how to make traditional food from a country that is not your own . Or he can do it . You neither have the time nor inclination .

Absolutely go to your mother's for Christmas. Tell him calmly he's on his own over this stupid idea.

He is being completely out of order. I would be willing to have them for Boxing Day and make an attempt to cook their food, and would even practice it in advance (get his mum to send you some simple recipes?). But this would have to be in an atmosphere of feeling included and taken care of, not excluded and taken advantage of. If he won't budge from his plans, then I agree you should go solo to your family for Christmas and leave him to it. And have a very serious chat about things in the the New Year. Would your folks be supportive if you did that?

What would he say if you tell him he invited them so he cooks for them? Or are you too scared of him to say that?

100%

Go to your family
His response to that will be very telling. Is he supportive and understanding? Or will he be a total arsehole about it?

He says I’m being miserable but he has absolutely no intention of helping with cooking as it hates it. In his country they are quite traditional

I'd also be very very seriously questioning if you want a child with a man.
At 5 weeks you are barely pregnant...

Call his cousin. Tell her what’s happened. If she’s a nice person she’ll understand and you can make a plan together. If she isn’t a nice person, then say to your DP that you can’t and won’t do it and your’re going to your parents. And stick to your guns.

He sounds like a right prick. You sure you want a baby with a prick?

I'd pack a bag and go to my family. I'd return when his family have fucked off. Infact, I wouldn't return at all.

Why the FUCK should her parents have to cook unfamiliar dishes for this tosser, when they have already hosted him for a few Christmases?????? Are you insane?

You're not unreasonable. If he wants to host guests, he needs to cook. Especially since it's food you don't know how to make. It's fine to want to have his traditions (he should actually ask before inviting guest though!) but if he wants it that way, he can't just expect you to be the one to make it happen.

Fair enough it’s his turn but he organises not you. Otherwise you get takeaways. Is he a Christian in his culture? Is there a tradition of celebrating it. If so you could ask cousin to bring traditional stuff as you don’t know what it entails

Why is it just a given that you will ‘have to’ cook for them? He sounds like a bully, I’d be planning your exit.

Why are you talking as though it is a done deal? Have you not read the responses on here?

If he wants his traditional food for Christmas he cooks it. He prepares for and cleans up after guests and ensured you are not excluded

Or better still, you have a serious think about this man and whether you really want the sort of life you will probably have if you stay with him.

You are not "over a barrel" unless he cooked you all that British Christmas food (which I know he didn't).

Just don't do it.

What makes him think that you, a person with zero experience of cooking food from his culture, will be able to successfully re-create the Christmas dinners of his childhood?

He is deliberately setting you up for failure. Worst case scenario: you'll slave away for three or four days to make all these dishes, and when everyone sits down to eat they'll complain the food doesn't taste right.

His traditions, his Christmas, his cooking, surely? It's not as if he had to cook for your parents! Lay a marker down now, OP, it will only get harder if you let this precedent be set now.

If you’re all in with this man and want the life that is unfolding before you, and don’t plan to chuck him over this, then invite your own family too. You shouldn’t be on the outside at Christmas, and your mum or dad can help you with the cooking, so you can have convivial times in the kitchen. As neither of you will have cooked their traditional dishes, the normal boss/sous chef hierarchy won’t be in place in the cooking and you can just have fun with it and muddle through together.

You’re not wrong to be upset with him over this, but on the other hand, you’re a few years down the line and having a baby together. Only you can know whether this is a big enough deal to follow the LTB advice, and if it’s not, then make the day your own and find ways to have fun with it.

BUT YOU DON’T HAVE TO COOK.

He could cook. He just doesn’t want to.

You don’t want to cook either, and that is absolutely fine.

Take a leaf out of his book and either dump the job on to someone else, or stick with your original plan of buying some stuff in.

I don't understand why you are accepting the premise that it is you who has to cook when it's him who has invited people over.
Why are you doing this? Are you happy to submit to out dated gender roles? Will you be happy with this approach going forward? Do you know what his expectations are for when you have the baby?
You need to really think hard about what you want from life and have some serious conversations with him. I think Christmas is the least of your worries.

I'm married to an Italian and would never ever attempt to single handedly make an Italian Christmas meal for extended family, not even after 20 years together and. 12 years in Italy. Not my idea of fun! If he wants that he can go to his mum's house. Stick to your m&s plan and tell him that's what he's getting and if he has another menu idea, he can cook.

I’m sorry but I can’t be bothered to read all of the background! He cooks what he wants. You cook what you feel able to do.
If that’s not acceptable, then he’s a twat.

If he wants his childhood dishes he needs to cook them
Just say fab idea darling i ll leave you to it

Or maybe you do half and half what you know what he knows

When did you agree to be the sole cook?

You sound very young. Leave this cunt. He’s showing you what a misogynistic arsehole he is and I can guarantee you can do better and within months you will be like wtf was I thinking.