With the eZ Platform 2.2 release coming next week, you might have read on our Slack channel already about joining the translation effort for eZ Platform 2.x.
The current status of some of the languages are:
French at 99%
German at 69%
Italian at 55%
Spanish at 27%
Norwegian at 70%
You can join and help translate eZ Platform, just go to the Crowdin eZ Platform project.