I discovered that, while the pages seem to follow the exact same structure and I suspect were written by the same person, the Dutch and English pages differ in a significant way: the English page says Wallonia/Belgium was the first industrialzed country in mainland Europe, while the Dutch page does not mention that qualification [1]. Elsewhere I found thr claim that Wallonia was the first fully industrialized region, but without year or source.

Timeline seems to be on your side though.

[1] https://en.m.wikipedia.org/wiki/Sillon_industriel