1. Open the Control Panel in Windows. This can be done by clicking on the Start button, typing “Control Panel” in the search bar, and then selecting the Control Panel from the search results.
2. Click on the Clock, Language, and Region option from the list of items you will see in the Control Panel.
3. On the next screen, click on “Change display language” in the Region and Language section to open up the Language preferences window.
4. In the Language preferences window, click on the “Add a language” button to explore a list of available languages.
5. Select the language you would like to add by clicking on it and then clicking the “Add” button at the bottom. Once added, your chosen language will appear in the list of installed languages.
6. To make your chosen language your default language, select it from the list and then click on the “Set as Default” button. This will make the selected language your primary language for the interface, menus, and all Windows features.
7. Finally, click on the “OK” button to save your settings and close the window. Your preferred language is now set as the default language in the Control Panel.