EDE uses the Transifex platform for creating and managing translations. For now, translations are not directly synchronized with EDE's repository, but that will be changed in the future.
To translate EDE and edelib, you need to create account on Transifex (unless you already have one). Then go to the EDE Localization page and send a request for the language you wish to translate to. After approval (which should happen very soon), you are good to go.
Translating the strings with Transifex is quite self-explanatory. If you should run into problems nevertheless, just post your problem on the EDE forum.