Polish students in the UK? They're very likely to experiment imo, you know young ppl experimemt a lot. I know I did in NL. ;)
Funny you should say that. I sponsored a young Pole through his studies in London, and when he finished his masters, he got a job for the Ministry of Cybersecurity. I still send him a good chunk of money every month SPECIFICALLY so that he has no excuse nor to try any new food he comes across. I've spent countless hours looking for good, but inexpensive, restaurants for him to to try.
I even spent a month in London myself on a culinary vacation last May and introduced him to tons of new foods. (I currently live in a culinary black hole, so the vacation was desperately needed). And I'm planning to take him on another month-long culinary adventure in Puebla, Mexico next year.
I've made a real foodie out of him. But he had two things that few Polish students have: someone to kick their butt and force them out of their comfort zone, and cash enough to experiment. In this case, cash earmarked specifically for experimenting. Without that, it's bread and cheese at the end of the day, as you said.