Without getting too picky, I see folk music doesn't actually exist outside of the English-speaking world, notably the USA. This will come as a bit of a surprise to vast swathes of the world's population. I also notice that folk appears primarily to be a very pale music as well as one that even in the USA barely exists in, say, the Appalachian Mountains or the Louisiana swamps. Finally, I see they are using the "marketing tool" version of folk rather than the "process" or "context" versions.

Ok, I'll shut TFU and git mah coat...