Translation error messages numbering modules

htdocs/admin/commande.php

htdocs/admin/contract.php

htdocs/admin/expedition.php

htdocs/admin/facture.php

htdocs/admin/fichinter.php

htdocs/admin/livraison.php

htdocs/admin/propal.php

htdocs/admin/supplier_invoice.php

htdocs/admin/supplier_order.php

htdocs/core/lib/functions2.lib.php

htdocs/langs/en_US/errors.lang

htdocs/langs/fr_FR/errors.lang