I've flown one of the 172s at Ljubljana - it was just an aeroplane.
Circuit and radio procedures are different to the UK, and there is apparently a need to file a flight plan for every little local flight, but the flying is the same.
Oh, and the navigation is different - lose track of where you are for a couple of minutes and you've probably crossed an international border.
So in a sane world you'd have to do a local Air Law exam and that would be about it.