There are several opportunites for translators to get involved with Creative Commons projects.
Licenses, deeds, choose license interface and API
These are all translated directly by CC [jurisdiction partner institutions]. While there are usually people at the partner institutions who handle these translations, there may be other ways to get involved locally. Contact information is available for each jurisdiction via the previous link.
We'd like every page on this wiki to be translated into as many languages as possible. See CcWiki:About#Translate for details.
Open source projects
See translating ccHost.