So far as I could tell from German enthusiast forums:
Schweers and Wall is a very small company, just 2 people. They have no internet presence other than their website(last updated in 2017). So their exact plans are a bit of a mystery.
It was originally planned to produce not just France, but also BeNeLux volumes. However, in 2012 Herr Schweers, who was leading these projects died suddenly and unexpectedly, and it's possible the idea of producing further volumes in this direction died with him.