    You should overwrite three files from the directory 'ellianerelle'  to the appropriate directory (fonts\russian\ellianerelle) inside the archive 'tdm_fonts01.pk4'. (Files *.pk4 in Dark Mod directory - ordinary *.zip archives. But all of them with the attribute 'read-only'. Attribute can be removed in the properties dialog of the file). Before any operations it is useful to make a backup copy of the file 'tdm_fonts01.pk4'.
    Russian translations can become better. But the font is needed not only for translators. Players without the proper fonts can not use translations, and translations in this case does not make sense.