404. That’s an error.
The requested URL /translate_c?act=url&depth=1&hl=en&ie=UTF8&prev=_t&rurl=translate.google.com&sl=auto&tl=en&twu=1&u=http://de.wikipedia.org/wiki/Spezial:ISBN-Suche/9783579080352&usg=ALkJrhjpNIHZ8fn0-qmuQ7TMTRfd5GjcJg
was not found on this server. That’s all we know.