Oo, scary. Not.
Amiga Inc. used to host third party translations of the mentioned manual on their website, those are spread around. I have hosted the mentioned manual on my own site for about 5 years without receiving any notes from the "copyright owners" (whoever they are), a quick search with google shows that I'm not alone.
On a related note, now as amiga.com is down for good, there are probably no (in your view) legal ways to obtain boingbag 1 for OS3.9, which is required for installing boingbag 2 - maybe people should worry more about that?