We are pleased to announce that KiCad has finally made a 2015 release branch. The 2015 stable release of KiCad will start from version 4.0.0. Currently we are in the release candidate phase and as such BZR 6188 is now known as 4.0.0 RC1.
The 4.0 branch can be found here: KiCad 4.0 Branch
The RC1 branch has been packaged as a archive available here: KiCad 4.0.0 RC1 Archive
The new GUI translations can be found in the kicad-i18n repository on github.
More details at KiCad site.
Thanks for the tip spanner888!