Config::getExportFolder

static function getExportFolder(): ?string
{
	static $exportFolder = -1;
	if ($exportFolder === -1)
	{
		$exportFolder = null;// '/bitrix/updates/_langs/';
		$confOption = MainConfigOption::get('translate', self::OPTION_EXPORT_FOLDER, '');
		if (!empty($confOption))
		{
			if (mb_strpos($confOption, MainApplication::getDocumentRoot()) === 0)
			{
				$exportFolder = $confOption;
			}
			else
			{
				$exportFolder = MainApplication::getDocumentRoot(). '/'. $confOption;
			}
		}
	}

	return $exportFolder;
}