localization strategy and variables

I thought there could be a risk of strangeness. I think there is a slide ID created as the slide is created. So it looks at the index, looks for the unique ID and restores. It looks like it might create those ID's in a unique sequence and not as a completely unique ID. Each object also has a unique ID. So to guarantee restore is clean and consistent, every element needs to be identical from a 

The question I would ask is "what's the risk that a user that starts in one language will want to continue in another language?" If the risk is low, maybe let it ride? If it's medium, you might be able to use another element like the cmi.core.lesson_location to store which language was first selected and automatically forward to the right spot when they restore. I don't believe this element is being used by Storyline but I could be wrong.