Specifying language from command line

[hess_joel]

I have an installer that was built with an early 6.x version (whatever was current last october) that I was able to specify the language using a cmdline argument "Language=Italian"

Now I'm trying to rebuild the same installer using 6.4 and the same argument isn't working. I've made some small changes to the installer (including the new C++ 8 runtimes) and some script changes (mostly file paths), but otherwise it's the same.

Should this still work and if not, how can I sepcify the language for the installer via command line?