/usr/share/phpbb3/www/language/nl/acp/ is in phpbb3-l10n 3.0.10-4+deb7u3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/phpbb3/www/language/nl/acp/attachments.php
/usr/share/phpbb3/www/language/nl/acp/ban.php
/usr/share/phpbb3/www/language/nl/acp/board.php
/usr/share/phpbb3/www/language/nl/acp/bots.php
/usr/share/phpbb3/www/language/nl/acp/common.php
/usr/share/phpbb3/www/language/nl/acp/database.php
/usr/share/phpbb3/www/language/nl/acp/email.php
/usr/share/phpbb3/www/language/nl/acp/forums.php
/usr/share/phpbb3/www/language/nl/acp/groups.php
/usr/share/phpbb3/www/language/nl/acp/index.htm
/usr/share/phpbb3/www/language/nl/acp/language.php
/usr/share/phpbb3/www/language/nl/acp/modules.php
/usr/share/phpbb3/www/language/nl/acp/permissions.php
/usr/share/phpbb3/www/language/nl/acp/permissions_phpbb.php
/usr/share/phpbb3/www/language/nl/acp/posting.php
/usr/share/phpbb3/www/language/nl/acp/profile.php
/usr/share/phpbb3/www/language/nl/acp/prune.php
/usr/share/phpbb3/www/language/nl/acp/search.php
/usr/share/phpbb3/www/language/nl/acp/styles.php
/usr/share/phpbb3/www/language/nl/acp/users.php