Hi,
sorry but I not understand well your question, anyway I will try to reply.
Easy Profile is build with Joomla MVC model, so you can find translation in these folder (like all Joomla language files):
(frontend) /language/de-DE/de-DE.com_jsn.ini
(backend) /administrator/language/de-DE/de-DE.com_jsn.ini
Now german language is translated like so:
about 90% frontend
about 60% backend
Social Network plugin is build with another framework and you can find translation tip at
http://docs.easy-profile.com/index.php/article/social-network-make-your-language. We does not have German translation for this plugin.
Is there also a German Support?
No sorry, only english.