I started working on a way to display two Bible translations at the same time some time ago. We have actually been using it for some time at my church and it seems to be working, so I’m sure we will merge the branch into a future release of Quelea. Can’t say when that will be though. If you would want to try to build it yourself, this is the branch you’d want to build, otherwise you’ll just have to wait until we merge it with the main branch and it will be available in the CI release.