There is GitLab interview at FLOSS Weekly, and from that xet7 got info that not all features are in Open Source version. For example, when xet7 tried to enable syncing latest Wekan changes from GitHub to GitLab.com, there was text that it is paid only / Enterprise feature. There seemed to be some translation support in GitLab, but no Finnish translation yet.
External CI/CD configuration in Starter and Bronze "Note that as part of our commitment to open source, public projects on Free GitLab.com have features equivalent to a Gold level subscription. So those public projects will continue to have this feature." so if I setup CI/CD at GitLab.com for Wekan Open Source project, I presume it stays working, and I can look at all features at Gold level that should work now at GitLab.com