while reading the man page of duplicity I found some minor spelling mistakes.
What is the easiest way to fix them, or have them fixed.
PS: I'm not a programmer
The quickest way would be to email the current maintainer listed within the man page.
In this case, it is Kenneth Loafman "firstname.lastname@example.org"
Or, you could log into Launchpad and submit a bug to the duplicity team:
Personally, I would send the report to Launchpad as this may have a better chance of hitting a wider audience and getting the desired results. YMMV.