Hey there,
You can language override the following language constant which is at
Backend > Extensions > Language > Overrides:
COM_EASYBLOG_USERNAME - "username"
APP_BLOG_USER_TITLE - "Blog"
COM_EASYSOCIAL_GENERIC_FRIENDS_PLURAL - "%1$s Friend"
APP_USER_BLOG_STREAM_CREATED_BLOG_POST="%1$s created a new blog post, %2$s"
APP_USER_BLOG_STREAM_REACTED="%1$s reacted to blog post, %2$s"
COM_EASYBLOG_POST_HITS="%1$s Hits"
Take note that if you see something like this '%1$s', you need to maintain it because that is the value.