In older versions of Ubuntu it was possible to change the language (if language packs were installed) during the login. Therefore the login-window showed a drop-down menu with all installed languages.
Now I'm using Ubuntu 13.04 And I'm not able to find this drop-down menu. I only found the possibility to switch the keyboard layout.
Has this (useful) feature been removed? Do I need to install additional software to get the "language switch" back?
You can replace the default unity-greeter with lightdm-gtk-greeter. How you do that is described at
System Settings -> Language Support -> Help -> Alternative language settings