You've either not done any research or looked in the wrong places.
There are several threads on here with info.
All the courses commercially available are generic.
Why would you want a UAE dispatcher licence (which does exist) when you are in spain?
There is no online course for UAE disaptcher licence. It is carried out by jeppesen in their training facility in DXB. If they were any good they might have responded to your post.
D.O.G