This is absolutely fascinating! I used google translate which seems to do a pretty good job. But, still, trying to understand - the lyrics you have here, which you attribute to Freddie, are the original unedited version? Where did these come from? And you're saying there's an unreleased demo of the song with these alternate lyrics?
And is there any other tie-in to the Pied Piper poem other than the "And the bees had lost their stings/horses were born with the wings of eagles' lines?