Hello! I'm not sure if I should tell this in some technical support forums or not, because it's not really a bug or problem that keeps the game from running. So I put it here for now.

When Geralt gives Gretka the toy from Ciri's room, she tells him that Ciri made it for her when she was sad. And that is the exact sentence where the error lies.
'Sad' does mean 'traurig' in German, in the subtitles there is the word 'traurigt', with an additional 't' that may have sneaked in there along with the 'g'. Sometimes I make this kind of mistake while typing, too and maybe that's why I noticed ;)

Well, I made a screenshot and pointed out the error. If I'm completely wrong in this forum, then please tell me where to turn to :) Thank you.