I have a very close friend from Poland that I have performed for a few of his recent birthdays. Unfortunately, I have never been able to master any songs in Polish other than So Lat, the birthday song. I found the language very difficult to sing phonetically, though I've tried numerous times.
His wife recently went to his nephew's wedding in Poland, and he sent me this trailer of the video taken during the event - WOW!
[video:google]
https://drive.google.com/file/d/0B7Cw2lf2-jakRE9pRnZ0MHVmcTQ/edit[/video]
Cheers,
Gary

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K+E=W (Knowledge Plus Experience = Wisdom.)