Hi! Annie Bissonnette,
Welcome to the Microsoft Community!
I realize that you've encountered a problem with the computer's language is set to English, but the language in the Microsoft Loop is French. and I understand how you feel.
Your problem should be caused by Microsoft Loop misrecognizing your current language.
If you need to use the English interface in Loop, please click the link: Microsoft Loop (cloud.microsoft)
Feel free to post back if you need further assistance.
Thank you for your understanding and patience and I look forward to hearing from you.
Best Regards
Eddy | Microsoft Community Support Specialist