This document discusses breaking down language barriers by using technologies that allow traditionally client-side languages like PHP and JavaScript to be used server-side. It introduces Quercus, which allows PHP applications to run on Java servers, and server-side JavaScript (SSJS) technologies like Rhino and SpiderMonkey that bring JavaScript to the server. The goal is to leverage existing skills in popular languages and make them applicable to more environments like enterprise Java applications. Code samples are offered to demonstrate these technologies.