If the Java API's are deemed copyrightable, then what about interfacing with the JVM? Would these APIs also be copyrighted?

Would you need a license to make a language to interface with a virtual machine? How would this affect languages such as Jython and JRuby?

How would this affect Parrot as a JVM alternative? Would this create more incentive to build on an Open Source alternative or would Parrot become a target for Oracle?