Nagging PSB "musical mysteries"

Here are what I consider to be the most pesistent, nagging mysteries related to the music of the Pet Shop Boys. Please note that I'm including only mysteries directly regarding their music. I know a lot of my fellow fans have questions about their personal lives, but that's simply not my interest here.

  1. In "To Step Aside," from what recording(s) were those samples of gypsy vocals taken? And what are their English translations?

  2. Do the following Pet Shop Boys tracks actually contain samples of these recordings by other artists, as has been speculated, or are these speculations mistakes or misunderstandings?