I actually got it work recently.
First you need to copy from the main module, in the story folder, the folder Journal in your module.
Inside, you have to look for the quest_prototype file. Examine the file and you will understand pretty easyly how it works.
You indeed need to use the translatedKey editor, that the quest_prototype file uses to get the quest title and description.
I am from a phone, so I can't tell you more, if you have problem just reply ill try to answer.
