About plugin internationalization

Hello @metagauss,

I’m a user of this plugin and also a translator volunteer for several Spanish locales. In fact, your plugin is already translated in 4 Spanish locales. But I found an internationalization issue with a string:

else{
  _e('This is <b>'.$dpwap_locFilenm.'</b> not a valid zip archive.','mpi');
}

The issue with this string is that you’re using a variable inside a translation function. This is not allowed and should to be fixed in order to avoid issues with the GlotPress parsing (the ww.wp.xz.cn translation platform). To fix it, you should to do something like this:

else{
  printf(
    /* translators: Name of the file */
    __( 'This is <b>%s</b> not a valid zip archive.', 'mpi' ),
    $dpwap_locFilenm
  );  
}

By the way, if you have a repository in GitHub, I could to send you a pull request.

Best regards,
Yordan.