No, Old Juul, the folk process is a universal thing. It is an ongoing phenomena that shapes the music we sing in much the same way that the waves of the ocean shape the stones and drift wood along the shore.

We have to start with something important, though, and that is that the phrase "Folk Songs" on a book cover and the phrase "Folk Songs" as it is used by ethnomusicologists.

If the way that you sang the songs in the book, what ever songs they were called, is the way that the music teacher taught, it probably doesn't have much to do with the folk process (but maybe still some)

If you sang a slightly different melody than was in the book, or left out or added some verses, or, especially, if you used different names in the song and made jokes out of some of the lines or verses, then the folk process comes into play.