Show the Windows installed language: dims /online / get-intl
In my case, this is the result:
C:\WINDOWS\system32>dism /online /get-intl
Deployment Image Servicing and Management tool
Version: 10.0.19041.3636
Image Version: 10.0.19045.6332
Reporting online international settings.
Default system UI language : nl-NL
The UI language fallback is : en-US
System locale : nl-BE
Default time zone : Romance Standard Time
Active keyboard(s) : 0409:00000409, 0413:00020409, 0813:00000813, 0813:00020409
Keyboard layered driver : PC/AT Enhanced Keyboard (101/102-Key)
Installed language(s): en-US
Type : Fully localized language.
Installed language(s): nl-NL
Type : Partially localized language, MUI type.
Fallback Languages en-US
The operation completed successfully.