Since the previous release candidate 115 commits have been made to fix bugs reported by users and developers alike.
The 4.0 source code branch is available in the BZR repository on launchpad here: KiCad 4.0 Branch
The RC2 branch has been packaged as a source archive available here: KiCad 4.0.0 RC2 Archive
The latest GUI translations can be found in the kicad-i18n repository on github.
They have not yet been tagged as a release yet, they are still some languages that are not 100% translated. No matter the state when the final release is made the translations will be tagged to make a release tarball.