for plugin c13y_upgrade, a Chinese traditional translator  can he translate

description -> Check integrity of upgrades.

$lang['c13y_upgrade_no_anomaly'] = 'No anomaly detected after application upgrade, "Check upgrades" plugin was deactivated.';
$lang['c13y_dbl_email_user'] = 'Users with same email address';
$lang['c13y_correction_dbl_email_user'] = 'Delete duplicate users';
$lang['c13y_obsolete_plugin'] = 'Obsolete plugin';
$lang['c13y_correction_obsolete_plugin'] = '"%s" plugin has been included in this application version and you must uninstall it.';

For update admin part to piwigo, a Chinese traditional translator  can he translate
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**************
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Thanks

For update public part to piwigo, a Chinese traditional translator  can he translate
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// missing translations
***********translate

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Thanks

He can also use new tool for translator ;-)
read topic:18049