roundcube の さんは書きました

を変更するには。

# ack mailreplyintro /usr/local/www/roundcube/program/localization/en_US/labels.inc /usr/local/www/roundcube/program/localization/ja_JP/labels.inc
/usr/local/www/roundcube/program/localization/en_US/labels.inc
275:$labels['mailreplyintro'] = 'On $date, $sender wrote:';

/usr/local/www/roundcube/program/localization/ja_JP/labels.inc
243:$labels['mailreplyintro'] = '$date に $sender さんは書きました:';