Hmm, I found a couple of files there. Maybe some piled up there from previous versions as well. I deleted all dcpomatic references in .config and also the net.carlh.dcpomatic.plist file. That did it.

Here's why: I did the translation for the default KDM-Email text ('Dear projectionist...') to german. But I never got to see it, because obviously there had been a previous text version in the preferences, and then DCP-o-matic doesn't use the default text. In my case, this text has probably been taken over from very early versions of DCP-o-matic.

And then there is a catch22 - It seems if you start up DCP-o-matic for the first time, the default english KDM-Email template is copied into preferences. When I change the language, the original english version is then considered custom made, hence you will never see a default foreign language text from the translations.

Maybe a button 'revert to language default' or simply 'reset to default text' in the KDM-Email tab? I think it's a good idea to get back the placeholders $CPL_NAME, $START_TIME, $END_TIME there in case one accidentally deleted them with a custom message. And I would add cinema name and screen name to this text, because this is the only way to confirm the KDM is targeted at the right screen.