private function localize($csvId)
    {
        $strings = [];
        $urlPart = '&single=true&gid=';

        if (is_array($csvId)) {
            foreach ($csvId as $id) {
                $parsed = $this->parse($this->csvUrl . $urlPart . $id);
                $strings = array_merge($strings, $parsed);
            }
        } else {
            $strings = $this->parse($this->csvUrl . $urlPart . $csvId);
        }

        return $strings;
    }