In the Language & region window, look for the section called "Preferred languages" . Click the "Add a language" button (the big + sign next to "Add a language").
Let us know in the comments below which English variant you chose
Click on your preferred English version (e.g., English (United States) ) and click the Next button.
Windows will now download the language pack from Microsoft servers. This may take a few minutes depending on your internet speed. You will see a progress bar next to the language in the list.
A pop-up window will appear. In the search box, type English . You will see a list of all English variants (United States, United Kingdom, Australia, Canada, etc.).
How to Download & Install the Windows 10 English Language Pack (Complete Guide)