For course items, you also translate the same as the course translation.
Please go to Dashboard => LearnPress => Quizzes=> Click to “Add translation to Japanese”.
The site will open the translating tab.
When the process is 100% complete, you need to click “Completed” to finish and review.
After selecting “Completed”, the site will return to the Quizzes page. In the Backend, you can see the lesson you have just translated.