Comment 6 for bug 1198972

Victor, OK then, all I can say at the moment is that you'd better build GoldenDict from sources yourself, since the version in Ubuntu repository is rather old.

To build GoldenDict from sources is rather simple, a couple of commands, that's all. Follow this instructions:
https://github.com/goldendict/goldendict/#installing-external-deps-on-ubuntu-linux

Also, consider this workaround for the X11 error problem:
https://github.com/goldendict/goldendict/issues/359#issuecomment-20671154