Add an input language
You can edit documents in multiple languages by changing the language (the input language) in which you type. Input languages are included with Windows, but you need to add them to your list of languages before you can use them.
Open Regional and Language Options by clicking the Start button , clicking Control Panel, clicking Clock, Language, and Region, and then clicking Regional and Language Options.
Click the Keyboards and Languages tab, and then click Change keyboards.
Under Installed services, click Add.
Double-click the language you want to add, double-click the text services you want to add, select the text services options you want to add, and then click OK.