Error messages in Sendmail

[Johnny Abou KARAM <jakaram aupelf refer org>]

Hi,
I would like to know the way to rewrite error messages returned by sendmail in French or german.

For example, when MailerDaemon returns USER UNKNOWN, I would like to be able to
configure My sendmail to Answer "Utilisateur non trouvé".


And of course all the rest of the messages.

Thank you in advance.

--
Johnny Abou KARAM