Add Different languages on PC

To add Languages on Computer:

• Click Start, then go to Control Panel
• In Control Panel click "Date, Time, Language, and Regional Options", or in classic view, simply "Regional and Language Options."
• Click the "Languages" tab
• Click "Details" - Classic View
• Click "Add..." and select your language from the drop-down box
• Select keyboard layout if necessary
• Press "OK" to confirm changes

When you want to switch languages, either press left Alt + Shift until the little box on the taskbar changes.
You can also add a key combination for each language. Just select "Key Settings" in Add language tab.