cgi. Am I correct?

Question

CGI

If you do not climb into the jungle. Do I understand the purpose of CGI correctly. For example, there is a website and today I needed to add a perl script, tomorrow I needed to add a C ++ script, after tomorrow on visual basic. As I understood after reading the forums in a hurry, cgi is a bridge that allows you to use different scripts on the server that will connect the client to the server. Suppose the site is in php and in the cgi folder scripts written in different languages ​​C, visual basuc, perl will perfectly coexist. Is it so. Thank you.