relationship advice

So I’ve travelled with my family and my partners family to their family abroad.
Moral of the story is that my partner has a lot of close cousins that we are seeing everyday. The first day I met them I was overwhelmed and I felt like they didn’t really greet me well as fair enough it’s the first time meeting. However, they all speak a different language and so do we but everyone can also speak English.
They always speak their language and fair enough that’s okay but I get tired and frustrated as I feel like that’s just disrespectful.
I try my best with everyone but I don’t fully open up so fast I hold a guard as I know if I am too nice people have taken advantage.
They’re just so moody I get that I have a resting face but doesn’t mean I don’t want to talk like I’ve tried to talk but they don’t bother. I am also on my period and I do feel irritated at times.
I feel like this was the worst thing to do and I’m here for two weeks I’ve seen a lot already and they have definitely been saying bad things about me. Apparently I’m giving dirts? When I’m just sitting as everyone is talking their langauge and it’s awkward for me to join. It’s unfair and my partner doesn’t understand either. I can’t just be a beg and start talking so much when nobody is making effort. I just want to go home now.
I’ve been crying all day it’s just too much for me
Please tell me what to do thanks

The onus is on your boyfriend to provide the social lubrication to ease you into the situation.
It's all down to how positively and enthusiastically he introduces. How he sits next to you and holds your hand. How he makes efforts to bring you into the conversation.
Give him gentle nudges on how you expect him to help you out here.
If they're all sitting there having a catching-up conversation, that's your cue to try to join in. If they keep leaving you out, you can get up and do something else, in a positive cheerful manner. Go start cooking, or gathering ingredients to cook, go for a country walk, or a swim in the sea or river, play a round of golf, do some sight-seeing, go clean and tidy your room, do some gardening, go do some paid work or studying on your laptop.
What's the worst that will happen? At the end of these 2 weeks you'll go home and dump him. In which case you'll have a set of great anecdotes from this episode.
You can't be responsible for the anti-social behaviour of others. You are responsible for how you use your own time. Make the most of these 2 weeks.