I am the Brazilian Portuguese translator for MetaProducts Inquiry language file.
Please, use the link bellow to download an "update" (minor changes for better) for the language file:
http://mchal.110mb.com/iq_pb.7z (if you happen not to be able to download, please contact me)
As to the missing text strings from the source-language file, please take a look at, for instance, the options dialog with the Brazilian Portuguese language file loaded into Inquiry and you'll see the ones that could not be translated on account of this.
Thanks for your attention.