Perl (5 or 6) doesn't try to treat a programming language as a natural language. Instead it tries to allow the structure in which the author's brain defines the problem to be able to match the structure in which the code of the program defines the solution. It is linguistic in the sense that it tries to follow the normal flow of human language as a form of communication, allowing skills learned for human communication to be re-used for communicating via source code--not in a natural, human language (still in a computer language) but without necessarily having to pivot the problem in to something more natural for computers first.
Source code is instructions for two audiences: A human, and a computer. The computer doesn't care what the syntax is, but the human does. It is an ongoing challenge to write code in a manner which effectively and concisely communicates to other humans, including your future self. This is a thing at which Perl5 and Perl6 both excel, Perl6 more so IMO (although there is not yet enough history to prove it).
It is true that one can easily write unmaintainable spaghetti in Perl5. One can write unmaintainable spaghetti in any language, but Perl5 makes it somewhat easier to do it by mistake--this is an aspect of the same versatility which gives it its expressive power, which in turn is what makes it possible to communicate things using Perl more effectively (in the same space) than with many other computer languages. You have to employ some discipline not to sound like a gibbering lunatic. This is not much different from human languages: if you have ever read English 101 papers you will find some of them sadly similar to Perl5 scripts written by similarly undisciplined authors.
In contrast to Perl5, Perl6 makes it far easier to avoid accidental spaghetti and does so without sacrificing any of the linguistic expressiveness that makes Perl generally so useful.
At work most of the coordination between programmers is via IRC--even though we're all in the same room.
So yeah, IRC is still used.
Anecdotally the population of some popular channels on freenode that I frequent has never been higher.