I was in Gladbeck for New Year's Eve 2007/2008 with my wife and we saw guest list for New Year's Eve ball, where many of guests on list had Polish surnames (more than I imagine one would see from any sample of list of German people). I did some reading later and saw that some relatively known people from Ruhr District have some Polish origins.

I wonder if you know Vedmak, do many of this people with Polish roots still speak Polish?