code: function guessLanguage(request){
  	//console.log("guessLanguage");
      if(typeof request === 'object'){
          var language_header = request.headers['accept-language'],
          languages = [];
          regions = [];
          request.languages = [currentLocale];
  		/*
  		for (x in request.languages)
  		{
  			console.log(request.languages[x] + x);
  		}
  		*/
          request.regions = [currentLocale];
          request.language = currentLocale;
          request.region = currentLocale;
  
          if (language_header) {
              language_header.split(',').forEach(function(l) {
                  header = l.split(';', 1)[0];
                  lr = header.split('-', 2);
                  if (lr[0]) {
                      languages.push(lr[0].toLowerCase());
                  }
                  if (lr[1]) {
                      regions.push(lr[1].toLowerCase());
                  }
              });
  
              if (languages.length > 0) {
                  request.languages = languages;
                  request.language = languages[0];
              }
  
              if (regions.length > 0) {
                  request.regions = regions;
                  request.region = regions[0];
              }
          }
          i18n.setLocale(request.language);
      }
  }
docs: guess language setting based on http headers