The old Irish folk music seems to have had abig following in Germany for many a year. I have heard many a tale from visiting musos regarding fine German hospitality. I heard that the German's latched on to British folk music many years ago as trad German stuff had come to be associated with the Nazis and generally was not that cool.
My mate Craig Herbertson (a scot) seems never to have looked back since emigrating to Germany a few years ago. Check out him and his group, Scapa Flow.