A very simple pig latin translator. Won't handle capitals or punctuation.

pig_latin.js

function pigLatin(phrase) {
  var arr, pigged;

  arr = phrase.split(" ");

  pigged = arr.map(function (word) {
    var first, rest;
    first = word.substring(0, 1);
    rest = word.substring(1);
    return rest + first + "ay";
  });

  return pigged.join(" ");
}