I don't think so. Wordpress is a blog - phpBB has another structure, because it is a bulletin board.
You can copy your topic into new phpBB topics manually.
Webseite, Blog, Wiki
Deutsche Übersetzungen - german language files
My 2 cents: Whether an extension is in the CDB says nothing about its quality. It is more important to read the support topics for it. Better to avoid authors who do not answer support questions themselves, who do not update their stuff, and who do not fix bugs for years.