I honestly always expect Wikipedia to be the first result for these basic searches.
Is there a way to report this to Wikipedia so that they can try to fix their referencing?
What if you try:
https://www.google.com/search?q=laine+de+verre&hl=fr
https://www.google.com/search?q=pompe+%C3%A0+chaleur&hl=fr
(note the "hl=fr" bit at the end).
I can see in both links the french version of Wikipedia within the first page at least.