I just logged in into an LXDE session (on an Ubuntu installation), and for me that drop-down menu looked like it usually does, so I wasn't able to reproduce the behavior you describe.
Please note that you need to have both language-selector-gnome and language-selector-common installed.
~$ dpkg -l | grep language-selector
ii language-selector-common 0.56 Language selector for Ubuntu Linux
ii language-selector-gnome 0.56 Language selector for Ubuntu
A side-note: By default it shows "none" for Vietnamese; don't know if that's how it should be...
I just logged in into an LXDE session (on an Ubuntu installation), and for me that drop-down menu looked like it usually does, so I wasn't able to reproduce the behavior you describe.
Please note that you need to have both language- selector- gnome and language- selector- common installed.
~$ dpkg -l | grep language-selector selector- common 0.56 Language selector for Ubuntu Linux selector- gnome 0.56 Language selector for Ubuntu
ii language-
ii language-
A side-note: By default it shows "none" for Vietnamese; don't know if that's how it should be...