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Article How to remove 'Unknown Locale (qaa-Latn)' from fresh Windows Server installation? answers how to remove the qaa-Latn language from the UI once the user has logged on, that is, from the input indicator, etc.

However, on the Windows logon screen there's a also a choice of languages/keyboards and I haven't been able to remove it from there, not even after removing the language from

Computer\HKEY_USERS\S-1-5-18\Control Panel\International\User Profile - Languages
Computer\HKEY_USERS\S-1-5-18\Control Panel\International\User Profile\qaa-Latn
Jorg K
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2 Answers2

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I solved this by running Set-WinUserLanguageList en-US in Administrator Powershell to reset all of my languages to just English and then manually re-adding my other languages in the Windows settings.

Seangle
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Uff, solved.

In Computer\HKEY_USERS\S-1-5-18\Control Panel\International\User Profile System Backup in en-DE (or some such) there was a reference to a 0x2000 keyboard which was also listed in Computer\HKEY_USERS\.DEFAULT\Keyboard Layout\Preload and Computer\HKEY_USERS\.DEFAULT\Keyboard Layout\Substitutes. Removing the key from Profile System Backup gave the success.

I also did a scan through the registry to ensure qaa-Latn was gone.

Jorg K
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