Déjà Vu does not have a filter that can process documents produced by Microsoft Publisher. The only way to import these files is to use an intermediate format.
Users of Déjà Vu who work with Publisher files have determined that the best intermediate format to use is HTML. You can export your publisher file to HTML format, translate that with Déjà Vu, and then import the translated HTML into Publisher. This may require some post-processing work in Publisher.