They exist to praise regionalism of the different autonomies(regions) of Spain by local politicians
What is up with that? Here in the states no one would even think of doing something like Californi-ux or Tex-ux, or Illini-ux. If some school district or state school administration wanted to switch to Linux they'd just choose edubuntu, or CentOS and be done with it. Why roll their own when they're perfectly suitable distros out there already.