Let Floy ("FLat jOY") be that susbet of Joy in which quotations are not allowed to contain more than one atom. This means that [] [3] [dup] [*] and [map] are allowed, but [[]] [1 2 3] [[3]] [dup *] and [[map]] are not.
https://hypercubed.github.io/joy/html/jp-flatjoy.html
@neauoire You may be interested in Equipage, a concatenative language that doesn't allow nesting quotations.
You can treat the stack as a set of delimited sections.
https://esolangs.org/wiki/Equipage