Re-import of translated text

Dear all,

I'm new in working with Articulate products, and I have a very basic question:

We are currently translating of a course created in Storyline 360. The translator is working within the exported word documents of the .story files.

How much time should I calculate for a storyline editor to re-import the translation and do minor adjustments on the layout? 

The course consist of 8 chapters, each chapter has around 40 slides and 45 slide layers (no slide masters and layouts)

I would be grateful for any feedback! 🙏