Perl is a programming language used by a handful of IndieWeb projects and personal sites.
Examples of IndieWeb community members who use Perl on their personal sites:
"I use 2500 lines of Perl that I wrote in a 20-hour-a-day spasm in the fall of 2002. I’d probably pay the digital equivalent of GotJunk dot com to haul it away if there were a good alternative." @timbray March 1, 2019
These libraries implement IndieWeb building blocks for use in Perl programs: