[TYPO3-mvc] How do I set up sys_language_uid in controller?

[Dmitry Vasiliev]

Hi all. When I creating a user in my controller, I also create him 
portfolio like

public function createAction(\TYPO3\Gcmodels\Domain\Model\User $newUser 
= NULL) {
....
     $newPortfolio = new \TYPO3\Gcmodels\Domain\Model\Portfolio;
     $newPortfolio->setSysLanguageUid(-1);
     $newPortfolio->setTitle($newUser->getName() . ' - portfolio');
     $newUser->addPortfolio($newPortfolio);
....
}

I need to SysLanguageUid in a portfolio is equal to = -1. Because I want 
to portfolio will be available in all languages.
But sys_language_uid not installed = -1 How do I set up sys_language_uid 
= -1?

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Kind regards, Dmitry Vasiliev