This shows a misunderstanding of what is meant by data, as was outlined by my first post. Indeed, you seem to be trying to separate the "machine parts" from the "human parts" something I stated is not possible. I would welcome you to try and show otherwise [patches welcome].
If you put together a wordlist based on interwiki links, that will be separable from the software that uses the list (the easiest way to do it would involve a separate file containing the list). You can release the software under GPL and the wordlist (if it's even copyrightable) under GFDL.