Multi language graded quizzing with question banks

Hello,

I'm working on a sales training course that isn't in multiple languages, but I'd like to be able to create multiple branching scenes based on the market where the learner works.  Because there are content differences between markets, I would also like to have different graded quizzes at the end of each branching scene.  However, I would like to be able to report only 1 score to the LMS based on the branched quiz that the learner selects.

I'm reading this post and others like it, and I'm wondering if anyone has any tips.  It sounds like some folks have resigned themselves to creating entirely separate courses, while others have experimented with variables or proxy slides as shown in this thread.

I'm fairly new to Storyline, so if anyone can help, I would be very grateful!

Grace