Do you have any idea what Perl is, and what the shell is? Perl doesn't have "its own shell scripting process" just like it doesn't have "its own Python scripting process" and Java doesn't have "its own Perl scripting process".

There's the language Perl, compiled and run by perl. There's Python, compiled and run by python, jpython and a few more implementations. There are a dozen or more closely related shell dialects, each interpreted and run by a different binary (sh, bash, zsh, ksh, psh, ash, csh, tcsh, etc).