I emailed our librarian and asked them whether it would be possible to cancel the Lingua description. She informed me that they canceled the print subscription long time ago and that the online version cannot be canceled since the FU has a contract until 2017 that was set up for all Berlin universities. These bundles make individual cancellations impossible.
One option that was considered by the FU was to not enter new contracts with Elsevier at all, but the sciences rejected this option.
Conclusion: We keep Zombie Lingua in our library and have to talk to the sciences and convince them that it is worthwhile to transform their journals into fair OA.