Hi Gauthier Serkijn
Indeed there is an option for that - with the Bilingual Excel file type.
Set that as the first Excel file type in your Project Settings > File types list, and in the file type settings you can define which column contains comments:
And you can check how it would look like in the Preview field.
And only then add the file into Studio.
Hope this is what you were looking for.
Greta Magyar - Customer Success Representative - SDL