code: function (code, items) {
          var langData = data[code];
  
          if (!langData) {
            data[code] = langData = {};
          }
  
          for (var name in items) {
            langData[name] = items[name];
          }
  
          this.setCode(code);
        }
docs: Adds translations for a specific language code.
  
  @method add
  @param {String} code Language code like sv_SE.
  @param {Array} items Name/value array with English en_US to sv_SE.