JSFiddle - React, Tailwind, and code Playground

JavaScript

String.prototype.spanishMeUpFam = function() {
	var e = ["eef", "fuff", "faf", "sus", "feef", "snance"];
    var r = this.split(" ").map(function(w) {
    	var d = e[Math.floor(Math.random()*e.length)];
        return w+"-"+d;
    }).join(" ");
    return r;
}

var t = prompt("Type a sentence.");
alert(t.eefafeef());