Fuji, on a NE-SW crossing of France: First I can't remember (been a couple of years), I think it was Strasbourg, then Lyon, then Marseille, then Barcelona (going into Girona). Got a squawk code and the occasional advisory. I was pretty much alone at FL085, so not much radio activity other than a request (granted) to cross some military airspace to avoid a squall line.
Similar experiences in Germany, Austria, Spain, Portugal. The main difference to the US seems to be that there is a lot less traffic out there in Europe at the altitudes I usually fly at, i.e. FL 75-95.