Get the preferred browser locale (language)

preferredLocale.js

// This is hacky. Have fun.

var identity = function(value) {
  return value;
};

var compact = function(list) { 
  var results = [];
  for (var i = 0; i < list.length; i++){
    if (identity(list[i])) results.push(list[i]);
  }
  return results;
};

var preferred = [].concat.apply([],compact([
  navigator.language,            // Safari, Chrome
  (navigator.languages || []),   // Chrome, Firefox 
  navigator.userLanguage,        // Internet Explorer
  navigator.browserLanguage,     // Fallback? Not sure.
  'en-GB'                        // Just in case
]));