The Silesian Digital Library has a new language interface, apart from Polish and English, the Czech language interface is also available http://www.sbc.org.pl/dlibra?action=ChangeLanguageAction&language=cs
This Product of Society of dLIBRA Users is free of charge for all digital libraries using the dLIBRA system. Authors of the software offer free installation of the interface in the actual version (2.5) of dLIBRA. Starting from the new version (3.0) of the system, language interface will be available for installation from the website of the Society of dLIBRA Users.
The German language interface is under construction, which soon will be available under the same conditions.