code: public function getWithFallback()
      {
          if (!is_null($this->overrideWithFallback)) {
              return $this->overrideWithFallback;
          }
  
          if (property_exists($this, 'withFallback')) {
              return $this->withFallback;
          }
  
          return TranslatableConfig::withFallback();
      }
docs: Get current locale
  
  @return bool