Excel to LearnDash -Platinum edition extension plugin is quite powerful. It lets you create and import quizzes in any langugae you want. Be it Freanch or Spanish or Hindi or Russian language or any other langugae . It is very easy and you do not require to do any special thing .
Just type in excel spreadsheet and import it to your site where learndash is installed.
Demo video on importing quiz in International Langugae