I understand that the slug is the one for the category just below this fake category label. Then there needs to have a reachable category below.
Is there a way to put the fake label at the bottom of the list? Is there a special slug like at-last or something that would allow to put it completely below everything?
Edit : I’ve found a hack.
I have added a dummy category where no one has any writing right but everyone has reading right. I hide this category with CSS display="none", and I made it appear last. It’s totally not satisfying but… it works great.