To translate any parts of EasyBlog, you will need to edit the language files. It is located in the default location as Joomla! language file does.

/administrator/language/en-GB/en-GB.com_easyblog.ini - For administrative section
/language/en-GB/en-GB.com_easyblog.ini - For front end section

To translate into your own languages, it is as simple as copying the default language file into your own language folder. For example, to translate into Spanish, you will want to copy the en-GB.com_easyblog.ini file into

/language/es-ES/es-ES.com_easyblog.ini

Happy translating!