I have tried opening several translations deleted all of those tries as I have found there is no machine translation to or from Czech language supported yet. Looking at Apertium it will take some time as Czech language is one big mine field for machine translation.
My problem is now I am getting red interwiki links suggesting translations and nowhere to disable them, even for languages I have started translations for and deleted them directly after it. The only way I have found to get rid of these links was to disable and reenable the whole Content Translation tool. So is there going to be some setting for this? Lower at #Red interwiki links, 20+ days ago, it seems to me some such settings page was promised.