code: protected function filterValues(array $values)
      {
          $attributes = $this->model->translatableAttributes();
  
          $translatable = [];
  
          foreach($attributes as $key) {
              if(array_key_exists($key, $values)) {
                  $translatable[$key] = $values[$key];
  
                  unset($values[$key]);
              }
          }
  
          return [$values, $translatable];
      }
docs: Filters translatable values from non-translatable.
  
  @param array $values
  @return array