The ContentTranslation does not pick up usable parameters from the call to the first page, that is given an URL parameters like &page=Åverk&from=nn&to=no&targettitle= it should use the values for the fields on the page. The user would still have to POST the next request to start the translation.
As I recall this worked like this in an earlier version. Could it be that it is something wrong with the URL?