Hungarian as well. Tomorrow = holnap, overmorrow = holnapután. You can also stack the ”után" if you so wish, like holnapután-után. But more than that and you will get some curious looks from others :)
In polish we do prefix po-. Jutro being tomorrow. Overmorrow would be pojutrze, after tomorrow, where you can stack one or two more, but ye more for comedic effect :)