ga_language_prefix.js

(function(_gaq) {
  var path = location.pathname,
    languages = ['en', 'sv'];

  // We want prefix == 'en|sv|etc' or null.
  var prefix = path.match(/^\/([a-z]{2})(\/.+)?$/),
    prefix = prefix ? prefix[1] : null;

  if (prefix && languages.indexOf(prefix) >= 0) {
    // If we are on '/en|sv|etc', fallback to '/'.
    var path_strip = '/' + prefix;
    path = path == path_strip ? '/' : path.replace(path_strip, '');

    _gaq.push(['_setCustomVar', 1, 'Language', prefix, 3]);
  }

  _gaq.push(['_trackPageview', path]);
})(_gaq);