Most companies already use multiple language, and for good reason as not all languages are suitable in all cases. The idea of having a single language everywher

Most companies already use multiple language, and for good reason as not all languages are suitable in all cases. The idea of having a single language everywhere is nice, but in practice this forces you into substandard solutions in some contexts. This is not a compelling argument for me. However, if you really do insist on having one language everywhere, you can also compile Clojure down to Javascript using a subset of Clojure called ClojureScript.Unlike Coffeescript, ClojureScript uses Clojure semantics and is not just a different syntax for Javascript. This doesn't save you from all the odd performance edge cases of Javascript, but at least it gives you conciseness and semantics of Lisp in the one situation where you have no choice of language: the browser.