O, ok, I didn’t test with languages enabled. Will try later. But that shouldn’t actually make a difference, because here only the selected user language is relevant, not your content language.
Just tested and enabling languages and setting only language to LT doesn’t make a difference.
I could reproduce it with 3.8.1. I changed the language of the current user. My frontend is multilanguage.
I my case non of the other language except de & en is translating.
Maybe it’s important to mention, that i use dynamic blueprint, which is failing.
Interesting, with later versions in my case I added Spanish, and it works. Maybe it has something to do with what initial languages are, as adding other additional language works for me, and in your case you have initial languages EN and DE set in plugin. I don’t know if it helps Anyway, I think we should move this to github again. I also sent you copy as you asked.