It's not uncommon it's used in France, which has a population of 66M (also Belgium).
This is just a classic case of a developer situated firmly at the first peak of the Dunning Kruger graph.
This is just a classic case of a developer situated firmly at the first peak of the Dunning Kruger graph.
I mean, if a basic authentication mechanism of a critical government website doesn't work with a keyboard layout, odds are incredibly likely that said keyboard layout is uncommon. Like not one of the developers, testers, stakeholders, or even other users had a problem -- and this isn't a problem you can just ignore -- so it probably isn't that big of a deal.
Is it a regrettable bug that made a poor assumption that breaks in special cases? Sure. Is it "Dunning-Kruger" (groan), or some demonstration of how stupid the developers are? Give me a break.
We don't really know that.
It may have been the first person able to complain - given you couldn't even file a support ticket without getting through this prompt!