Now $string['next'] of lang/en_utf8/moodle is used both Wiki (mod/glossary/lib.php - line2434) and Backup report (admin/report/backups/index.php - line60). Because it's difficult to translate grammatically, backup report table header 'Next' needs to be fixed as below.

File: lang/en_utf8/moodle.php
Line:168
[Before]
$string['backuporiginalname'] = 'Backup Name';
[After]
$string['backupnext'] = 'Next backup';
$string['backuporiginalname'] = 'Backup Name';

File: admin/report/backups/index.php
Line: 41
[before]
$strnext = get_string("next");
[After]
$strnext = get_string("backupnext");

See backup_report.patch for more detail.