I've marked this as needing to be fixed in language-selector because manually switching your locale to another language or variant and then back to en_US will make LANGUAGE="en_US:en_GB:en" again.
localechooser is only part of the installer, right? -- en_US users see en_GB strings all over? https://launchpad.net/bugs/10822 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
