Input method editors or IMEs make it easier to type in languages (usually but not limited to East Asian ones) that are made up of thousands of characters that can't fit on a standard keyboard.
When you buy a new Windows 8.1
or Windows RT 8.1 PC, or install Windows 8.1 on an older PC and add a language, Windows will automatically assign either a default keyboard or IME for each language on the PC. You can also add additional IMEs if you want.
Some IMEs don't work in the new Windows user interface.
Swipe in from the right edge of the screen, and then tap Search.(If you're using a mouse, point to the upper-right corner of the screen, move the mouse pointer down, and then click Search.)
Enter Region and language settings in the search box, and then tap or click Region and language settings.
In your list of languages, tap or click the language you'd like to add an IME to, and then tap or click Options.
Tap or click Add a keyboard.
Browse the list of available IMEs, and then tap or click the IME you'd like.
If you’ve added more than one language to your PC or more than one input method to a language, you can enter text the way you want by switching between IMEs or keyboard layouts.
If you're on the desktop, tap or click the language abbreviation button on the taskbar, and then tap or click the input method you want to switch to.
You can also do this from the Settings charm:
Swipe in from the right edge of the screen, and then tap Settings.(If you're using a mouse, point to the lower-right corner of the screen, move the mouse pointer up, and then click Settings.)
Tap or click the abbreviation for the language that's selected.
In the list that appears, tap or click the language you want to switch to.
To see the settings and options for any IMEs you've added, follow these steps:
In your list of languages, tap or click a language to see the related input methods.
Tap or click an IME, and then tap or click Options.
Change the settings you want.
Some IMEs have additional settings located in Control Panel. To see these settings, follow these steps:
Enter Add a language in the search box, and then tap or click Add a language.
Tap or click Options next to a language.
Tap or click Options next to an IME.
Use the IME mode icon to switch between alphanumeric and native language characters.
To bring up the IME mode icon in the new Windows user interface, tap or click in a new text field. Then, tap or click the icon to switch modes.
On the desktop, tap or click the IME mode icon on the touch keyboard or the taskbar to switch modes. To see more IME options, press and hold or right-click the icon in the taskbar.