Friendica is a community project, and people around the world have started to create and collect resources in other languages. If you know of any sites bundling such efforts, please drop us a line.
Guides and tutorials
Portal pages and groups:
Friendica has an API compatible with the StatusNet API, which means that you can use mobile StatusNet clients with your friendica account. You can find a list of clients here. If you are using Android on you mobile device there is also a dedicated friendica client, also have a look into your store for downloads of this app.