How add namespace to translator json file Larravel

I use this code, to add new directory with langs

    $this->app['translator']->addNamespace(
        $this->namespace,
        $this->getLangPath() . DIRECTORY_SEPARATOR . 'lang'

    );
$this->app['translator']->addJsonPath(
            $this->getLangPath() . DIRECTORY_SEPARATOR . 'lang'

        );

but I need use namespace to get this lang works with en.json file

if works fine with but if i need use name space like

it not works. How we can add namespace to json translator? https://laravel.com/docs/5.6/localization#using-translation-strings-as-keys

I use laravel 5.6

via Chebli Mohamed