trans_pdf.download_comparison_pdf( dest_folder=None )
Download a side-by-side preview in which each original page is placed next to the translated version. This is a great way to check the integrity of your translation.
A watermark is applied and the PDF is encrypted so that it cannot be edited in any way.
Destination folder for the downloaded PDF. If not supplied, the file is written to the current working directory.
The name of the PDF file just downloaded.