Comment 27 for bug 803858

Vincent,

You can use Language Support, which is the primary tool for language/locale handling in Ubuntu.

But talking about default... Both Xubuntu and Lubuntu ship lightdm-gtk-greeter as the default greeter, and they have choosen to enable the language chooser by default. Standard Ubuntu users of lightdm-gtk-greeter have to explicitly change a config setting to see the language chooser (if they even know that it exists). I think it's time that the language chooser feature is enabled in lightdm-gtk-greeter by default. I have linked a related merge proposal to this bug report.