Double hit open Win10 Control Panel, click Add Language. As shown in the following figure.
In the Language window, click Add Language, as shown in the following image.
There are a number of languages that can be added to the Add Language window, as shown in the following illustration.
Find the English Input method and select it, then click Open, as shown in the following image.
Open English dialect interface, English and Chinese like, different regions have different dialects, choose your favorite English dialect, and then click Add, as shown in the following figure.
After adding a language, you can see the English input method just added when you return to the language interface. As shown in the following figure.
Click on the lower right corner of the input method, you can see the English input method has been added successfully, as shown in the following figure.