Hi Eduard, while I agree to the suggested german terms it IMHO isn't important enough to add a patch to the Debian packaging of virt-manager.
You could, although, easily provide this suggestion to the upstream project. In [1] they document how to do that. [1]: https://github.com/virt-manager/virt-manager/blob/master/CONTRIBUTING.md#translations -- Christian Ehrhardt Staff Engineer, Ubuntu Server Canonical Ltd
