hey robert,
actually at this point of time these parts should be already available in the language files. are you using the latest blog app and have a fully translated language file on your system? in case it was missed: the language files for apps like the blog app (but also others) are no longer automatically installed when you sync the language via easysocial backend. for the blog app as example you can now grab them from the easyblog project at transifex.
but if everything's up-to-date and you still face these issues please feel free to get back to us and then provide us with your site details and ftp access so that we can check this directly at your site.
hope that helps and have a nice day