To ensure that the language pack is fully applied, you may need to check the following steps:
- Make sure that you have downloaded the correct language pack for your Windows 11 OEM image.
- Ensure that the language pack is installed correctly. You can check this by going to Settings > Time & Language > Language. If the language pack is installed correctly, it should be listed under "Preferred languages."
- If the language pack is installed correctly, but not all parts of it are working, you may need to try reinstalling the language pack or installing any available updates.
- If you are still experiencing issues, you may need to contact Microsoft support for further assistance.
Hope it helps.