Hello!
Considering what was said at
http://translatewiki.net/w/i.php?title=Support&diff=next&oldid=1568536#coll-template_blacklist_title
I would suggest to replace the value of the message [[MediaWiki:coll-template_blacklist_title]] from "[[MediaWiki:PDF Template Blacklist]]" to "[[MediaWiki:Book Creator Template Blacklist]]", because the extension is not only about PDFs (it generates other thinks, like Open document files or printed book)
Helder
Version: unspecified
Severity: enhancement