Hello GGininDer_EUW,
Good day! I'm John Dev a Windows user like you and I'll be happy to assist you today. I know this has been difficult for you, Rest assured, I'm going to do my best to help you.
Please try this if it helps.
Open and Run PowerShell(Admin)
Copy and paste the command below then hit Enter:
$UserLanguage = New-WinUserLanguageList en-US
After that, copy and paste the command below then hit Enter:
Set-WinUserLanguageList $UserLanguage
Press Y then Exit PowerShell
Restart your computer
After restart, English (United States) will be the only language under Preferred Languages. Kindly add other languages again.
Kindly let me know if this helps or if you have any further concerns.
Kind regards,
John DeV
Independent Advisor