Hello greg
I have made the following steps as she indicates herself in the course:
In this step everything goes well
First, download language packs from the ATutor Web site to import into your ATutor installation. Then open the Language Manager by selecting Language from the administrator's menu. On the Language Manager screen click on the Browse button to locate the downloaded language pack on your hard drive (e.g. atutor.fr), then press Import to upload and install the new language.
I do not understand how Delete the existing version of the language you are installing before importing the file.
When importing is completed, feedback indicates if in the installation was successful. But The list of available languages is not updated. Reason why I not like changing the language.
Thanks