Windows 10/11: Add system language

1. Click the Windows logo.
2. Enter "language".
3. Select "Add a language to this device" from the search results.
4. Under "Preferred languages", click "Add a language".
5. Select the desired language and click "Next" to install it now.

Note: Not all languages support additional features (e.g. optical character recognition). Use the symbols next to the languages to learn more about additionally supported features.