no, the microlight (called ultralight outside the U.K.) license is totally separate from all others.
Is that really the case? When I originally did my JAR PPL, Flexwing microlights were just difference training on a PPL. I know we're not talking Flexwing here, and it's not EASA nor JAR, but I'd be really surprise if it'd changed that much that there was no simpler path to fly a microlight on an EASA PPL.