In Windows 10 computer, you can add new keyboards by means of the following two methods.
Video guide on how to add keyboard in Windows 10:
Way 1: Add a keyboard in Settings.
Step 1: Access Settings.
Step 2: Choose Time & language.
Step 3: Select Region & language, click a language and tap Options.
Step 4: Hit Add a keyboard and choose a keyboard from the list.
Way 2: Add a keyboard in Control Panel.
Step 1: Enter Control Panel.
Step 2: Select Add a language.
Step 3: Tap Options to continue.
Step 4: Click Add an input method.
Step 5: Choose an input method and hit Add.
Step 6: Click Save.