Perl is a highly capable, feature-rich programming language with over 36 years of development.
Raku (formerly known as Perl 6) is a sister language, part of the Perl family, not intended as a replacement for Perl, but as its own thing - libraries exist to allow you to call Perl code from Raku programs and vice versa.
The Perl Foundation is dedicated to the advancement of the Perl programming language through open discussion, collaboration, design, and code.