I mean, you know... Probably would be weird to talk to ie your family member in a foreign language rather than your own language. The problem is when all your friends are from your home country and you create these weird cliques... I agree, the whole point of leaving the country is, well, leaving the country. Hell, even when I was on short student exchange in Germany the first thing I did was to almost stop hanging out with polish classmates and hanged out with germans. I knew I'd have poles back when I came back to Poland so why waste student exchange on hanging out with exactly the same people.
Here in Sri Lanka I'm also basically living in normal local neighbourhood, not a hotel, have sri lankan neighbours, even stayed at sri lankan friends' house for a month when I arrived (disclaimer: I paid bills lol). But I don't have work here, all my clients are from Poland and I had trouble getting the visa during this time so it's a bit of a different situation... They didn't let me integrate. On one hand, sri lankans are super friendly (but like, bruh... very relaxed, always smiling people) and I have a bunch of them from different neighbourhoods on my Whatsapp but then they're always Poland, Poland... Poland this, Poland that. They always tell me to give my polish address, I had to put this even on rental agreement! My address back in Poland (I don't live there anymore, it's ridiculous). There was no visa available for people working remotely during this whole time. Let's get real, the visas that are available are quite accessible (I mean living in the tropics 5 months in a year ain't bad, no?) but that country isn't really suitable for immigrating long term... Maybe nice for a vacation house. Tbh even some retirees choose to stay 5 months and go to Thailand/Bali/Vietnam/etc the rest of the year because they don't like sri lankan long term visa system either.
Hmmm I saw some poles are basically like you said, they emigrate for economic reasons only and actually like it in Poland but there's no (paying) work available so they go abroad, keep to each other, try to squeeze as much money as possible out of their stay and they return to Poland for retirement and buy a house, etc. I fuckin abhorr Poland so it's a different situation. I never wanted to stay in Poland, I wanted to leave earlier but they didn't let me leave. So there's a bit of a political and religious issue going on, not just economic migration. But I do have money issues lately as well so yeah, sometimes these things happen too, it doesn't mean someone emigrated for economic reasons only or even mainly. Economic migrants probably won't integrate because they actually like their home country.