The language attribute in JavaScript is probably one of the most ignored attribute in an Ajax based application. This form of attribute has become so familiar that developers have started to ignore it. The language attribute in JavaScript may just look like a simple command for the browser but without it, the application will not work. This basic function will practically set the stage for other codes to be interpreted in the browser. As JavaScript and Ajax increases its functionality, the importance of properly using language attribute in these types of application is also realized.