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ERROR_MUI_INTLSETTINGS_INVALID_LOCALE_NAME
ERROR_MUI_INTLSETTINGS_INVALID_LOCALE_NAME means Windows rejected the locale supplied for a UI-language installation operation. The requested locale does not identify a valid language configuration for the operation.
Record the locale string passed to the installation API and compare it with locales supported by the target Windows image. Correct the language identifier before troubleshooting package download or storage.
What to check
- Check the locale passed by deployment tooling or policy against the supported Windows language name.
- Do not substitute a folder name, display name, or arbitrary culture string for the locale expected by the language installation API.
- Correct the deployment configuration and retry the language installation.
Microsoft: MUI Resource Management
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