If you wish to translate the pagination on the blog page (for instance Page 1 of 2) you have to edit the file called wp-pagenavi.php which can be found in /includes directory. Open the file and go to line 114 and replace the line

$pages_text = str_replace("%CURRENT_PAGE%", number_format_i18n($paged), $pagenavi_options['pages_text']);

with

$pages_text = str_replace("%CURRENT_PAGE%", number_format_i18n($paged), ('Test %CURRENT_PAGE% test %TOTAL_PAGES%'));

Now simply replace the test words with your own.