Regex in Javascript Certification

Why is there a Regular Expressions section in the JavaScript Algorithms And Data Structures Certification? Can regex not be used in almost all programming languages? Why should it be a part of the JavaScript Certification?

Regular expressions do exist in most programming languages. FCC, however, only teaches JavaScript. The fact that it is in the JavaScript section does not imply that it only exists in JavaScript but just that RegEx is required for completing the JavaScript section. A great deal of what is covered is not language specific.