Would it be better to have the text say "Install Fedora" instead of ".. to Hard Drive"? Hard Drive is becoming an obsolete term. You have flash drives, SSDs, or whatever else people install Fedora to.
I pull that string from default anaconda launcher. If they change it, it will change also in the button. I proposed it here: https://bugzilla.redhat.com/show_bug.cgi?id=809499