HttpRequest::getAcceptedLanguages

public function getAcceptedLanguages()
{
	if ($this->acceptedLanguages === null)
	{
		$this->acceptedLanguages = [];

		$acceptedLanguages = explode(',', $this->server->get('HTTP_ACCEPT_LANGUAGE'));
		foreach ($acceptedLanguages as $language)
		{
			$lang = explode(';', $language);
			$this->acceptedLanguages[] = $lang[0];
		}
	}

	return $this->acceptedLanguages;
}