I'm not convinced. Which languages have Perl influenced, really? All the things that other languages seem to draw from Perl could just as well have come from e.g. awk, Smalltalk, and other languages that came before Perl.
Most of the uniquely Perly things (topicalisation, autovivification, regexes in the language syntax, context sensitivity) haven't been picked up by other languages.
The only really Perly thing that was picked up elsewhere is CPAN, but that's not part of Perl-the-programming-language but Perl-the-community.
(Oh I guess PHP picked up sigils from Perl but misunderstood them and that was the end of that.)
Besides the regex literals, Ruby does have sigils of a sort (@ and $) but with different meanings. Also the quotelike operators (q, qx, qw becomes %q, %x, %w).
Most of the uniquely Perly things (topicalisation, autovivification, regexes in the language syntax, context sensitivity) haven't been picked up by other languages.
The only really Perly thing that was picked up elsewhere is CPAN, but that's not part of Perl-the-programming-language but Perl-the-community.
(Oh I guess PHP picked up sigils from Perl but misunderstood them and that was the end of that.)