Ghacks posted a tutorial about adding keyboard input languages to Ubuntu

It is easy to type in multiple languages in Ubuntu. This tutorial will guide you through the simple steps to adding keyboard languages to Ubuntu and show you how to modify the settings for keyboard shortcuts to toggle between languages. You can switch between different keyboard layouts, preview and print the layouts, and alter settings at any time.

To add keyboard languages in Ubuntu, click on “System” and this will open the System menu. Select “Preferences” and then “Keyboard”.

  How to Add Keyboard Input Languages to Ubuntu