change product language in order detail in BO

[Saraaa]

Hello

I am running Prestashop 1.6.1.23 and I have 2 languages installed, 

The issue I am now facing is if someone orders in for instance english, in the order detail in the back office the product name is in english and in the invoice it is in engliqh too 

I want to change it to french, I mean when the order is done I want the product name that we'll be inserted in the table order detail in the data base to be in french.

Is it possible? And are the files I need to modify ?

Edited April 14, 2019 by Saraaa (see edit history)

[linaslp]

Same help needed