Hello evensantoine-hot,
It's nice to see you in Community. Welcome! QuickBooks Online has the flexibility you need, to personalize your company preferences. I would be glad to assist!
Here's how to edit the language;
1. Open your Settings , then Account and settings
2. Select the Advanced tab, then scroll down to the Language section
3. Click the pencil icon to edit, and then choose the desired language from the drop-down menu
4. Hit Save, then Done
In addition, you can send your invoices in a different language in QuickBooks Online.
If you have any other questions, please don't hesitate to reach back out. We would be happy to help!
