Great work MacMan (and others).
My Dutch ML 10.8.2 installation with UniBeast 1.7.0 works just great
(no language changed) (no APP name changed)
@ banquish : the certificate is valid.
And for the once have install failure, is it possible that you already have used the APP for install ?
I'm not sure but I heard that after a succeeded install the file
APP -> Contents -> SharedSupport -> InstallESD.dmg is gone (or become smaller)
and I think that UniBeast needs it for install..
(and MAYBE you need to be logged in into APPStore when using UniBeast, like if you copy back a saved game
on a fresh install and try to start it, you need to log in too then)
Or maybe the APP is downloaded under another AppleID or a different system.
Try delete the APP and download it again from APPStore, it might work then (fingers crossed)
GreetingZz and happy hacking