Do somebody know if it refers to our beloved language

I think so — I wouldn't know what else it could refer to.

and in such a case why it was written?

My guess would be that the author of that document is either simply a Perl hater, or is proud that nothing but a "clean" processing chain had been employed to produce the document, i.e. no ugly text munging, which I suspect the author associates with Perl...  At least that's the impression I get from reading the paragraph before the quoted sentence.