If you want to type in other languages, you can add different keyboards
- Choose System->Preferences->Keyboard
- Click on the Layouts tab
- Click on Add
- Click on Layout Options and go to "Key(s) to change layout" - This will allow you to use keyboard shortcuts to quickly switch between keyboards.
- In your toolbar, you will see the current layout (e.g. en). You can click on it to change layouts. Right-click on it to "Show Current Layout" and see "Keyboard Preferences"