diff --git a/htdocs/admin/pdf.php b/htdocs/admin/pdf.php
index d5873e2a50e..cee63fd91fd 100644
--- a/htdocs/admin/pdf.php
+++ b/htdocs/admin/pdf.php
@@ -52,22 +52,22 @@ if ($cancel) {
 }
 
 if ($action == 'update') {
-	dolibarr_set_const($db, "MAIN_PDF_FORMAT", GETPOST("MAIN_PDF_FORMAT"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_PDF_FORMAT')) dolibarr_set_const($db, "MAIN_PDF_FORMAT", GETPOST("MAIN_PDF_FORMAT"), 'chaine', 0, '', $conf->entity);
 
-	dolibarr_set_const($db, "MAIN_PDF_MARGIN_LEFT", GETPOST("MAIN_PDF_MARGIN_LEFT"), 'chaine', 0, '', $conf->entity);
-	dolibarr_set_const($db, "MAIN_PDF_MARGIN_RIGHT", GETPOST("MAIN_PDF_MARGIN_TOP"), 'chaine', 0, '', $conf->entity);
-	dolibarr_set_const($db, "MAIN_PDF_MARGIN_BOTTOM", GETPOST("MAIN_PDF_MARGIN_BOTTOM"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_PDF_MARGIN_LEFT')) dolibarr_set_const($db, "MAIN_PDF_MARGIN_LEFT", GETPOST("MAIN_PDF_MARGIN_LEFT"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_PDF_MARGIN_RIGHT')) dolibarr_set_const($db, "MAIN_PDF_MARGIN_RIGHT", GETPOST("MAIN_PDF_MARGIN_TOP"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_PDF_MARGIN_BOTTOM')) dolibarr_set_const($db, "MAIN_PDF_MARGIN_BOTTOM", GETPOST("MAIN_PDF_MARGIN_BOTTOM"), 'chaine', 0, '', $conf->entity);
 
-	dolibarr_set_const($db, "MAIN_PROFID1_IN_ADDRESS", GETPOST("MAIN_PROFID1_IN_ADDRESS"), 'chaine', 0, '', $conf->entity);
-	dolibarr_set_const($db, "MAIN_PROFID2_IN_ADDRESS", GETPOST("MAIN_PROFID2_IN_ADDRESS"), 'chaine', 0, '', $conf->entity);
-	dolibarr_set_const($db, "MAIN_PROFID3_IN_ADDRESS", GETPOST("MAIN_PROFID3_IN_ADDRESS"), 'chaine', 0, '', $conf->entity);
-	dolibarr_set_const($db, "MAIN_PROFID4_IN_ADDRESS", GETPOST("MAIN_PROFID4_IN_ADDRESS"), 'chaine', 0, '', $conf->entity);
-	dolibarr_set_const($db, "MAIN_PROFID5_IN_ADDRESS", GETPOST("MAIN_PROFID5_IN_ADDRESS"), 'chaine', 0, '', $conf->entity);
-	dolibarr_set_const($db, "MAIN_PROFID6_IN_ADDRESS", GETPOST("MAIN_PROFID6_IN_ADDRESS"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_PROFID1_IN_ADDRESS')) dolibarr_set_const($db, "MAIN_PROFID1_IN_ADDRESS", GETPOST("MAIN_PROFID1_IN_ADDRESS"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_PROFID2_IN_ADDRESS')) dolibarr_set_const($db, "MAIN_PROFID2_IN_ADDRESS", GETPOST("MAIN_PROFID2_IN_ADDRESS"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_PROFID3_IN_ADDRESS')) dolibarr_set_const($db, "MAIN_PROFID3_IN_ADDRESS", GETPOST("MAIN_PROFID3_IN_ADDRESS"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_PROFID4_IN_ADDRESS')) dolibarr_set_const($db, "MAIN_PROFID4_IN_ADDRESS", GETPOST("MAIN_PROFID4_IN_ADDRESS"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_PROFID5_IN_ADDRESS')) dolibarr_set_const($db, "MAIN_PROFID5_IN_ADDRESS", GETPOST("MAIN_PROFID5_IN_ADDRESS"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_PROFID6_IN_ADDRESS')) dolibarr_set_const($db, "MAIN_PROFID6_IN_ADDRESS", GETPOST("MAIN_PROFID6_IN_ADDRESS"), 'chaine', 0, '', $conf->entity);
 
-	dolibarr_set_const($db, "MAIN_GENERATE_DOCUMENTS_WITHOUT_VAT", GETPOST("MAIN_GENERATE_DOCUMENTS_WITHOUT_VAT"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_GENERATE_DOCUMENTS_WITHOUT_VAT')) dolibarr_set_const($db, "MAIN_GENERATE_DOCUMENTS_WITHOUT_VAT", GETPOST("MAIN_GENERATE_DOCUMENTS_WITHOUT_VAT"), 'chaine', 0, '', $conf->entity);
 
-	dolibarr_set_const($db, "MAIN_TVAINTRA_NOT_IN_ADDRESS", GETPOST("MAIN_TVAINTRA_NOT_IN_ADDRESS"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_TVAINTRA_NOT_IN_ADDRESS')) dolibarr_set_const($db, "MAIN_TVAINTRA_NOT_IN_ADDRESS", GETPOST("MAIN_TVAINTRA_NOT_IN_ADDRESS"), 'chaine', 0, '', $conf->entity);
 
 	if (!empty($conf->projet->enabled)) {
 		if (GETPOST('PDF_SHOW_PROJECT_REF_OR_LABEL') == 'no') {
@@ -82,20 +82,20 @@ if ($action == 'update') {
 		}
 	}
 
-	dolibarr_set_const($db, "MAIN_GENERATE_DOCUMENTS_HIDE_DETAILS", GETPOST("MAIN_GENERATE_DOCUMENTS_HIDE_DETAILS"), 'chaine', 0, '', $conf->entity);
-	dolibarr_set_const($db, "MAIN_GENERATE_DOCUMENTS_HIDE_DESC", GETPOST("MAIN_GENERATE_DOCUMENTS_HIDE_DESC"), 'chaine', 0, '', $conf->entity);
-	dolibarr_set_const($db, "MAIN_GENERATE_DOCUMENTS_HIDE_REF", GETPOST("MAIN_GENERATE_DOCUMENTS_HIDE_REF"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_GENERATE_DOCUMENTS_HIDE_DETAILS')) dolibarr_set_const($db, "MAIN_GENERATE_DOCUMENTS_HIDE_DETAILS", GETPOST("MAIN_GENERATE_DOCUMENTS_HIDE_DETAILS"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_GENERATE_DOCUMENTS_HIDE_DESC')) dolibarr_set_const($db, "MAIN_GENERATE_DOCUMENTS_HIDE_DESC", GETPOST("MAIN_GENERATE_DOCUMENTS_HIDE_DESC"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_GENERATE_DOCUMENTS_HIDE_REF')) dolibarr_set_const($db, "MAIN_GENERATE_DOCUMENTS_HIDE_REF", GETPOST("MAIN_GENERATE_DOCUMENTS_HIDE_REF"), 'chaine', 0, '', $conf->entity);
 
-	dolibarr_set_const($db, "MAIN_DOCUMENTS_LOGO_HEIGHT", GETPOST("MAIN_DOCUMENTS_LOGO_HEIGHT", 'int'), 'chaine', 0, '', $conf->entity);
-	dolibarr_set_const($db, "MAIN_INVERT_SENDER_RECIPIENT", GETPOST("MAIN_INVERT_SENDER_RECIPIENT"), 'chaine', 0, '', $conf->entity);
-	dolibarr_set_const($db, "MAIN_PDF_USE_ISO_LOCATION", GETPOST("MAIN_PDF_USE_ISO_LOCATION"), 'chaine', 0, '', $conf->entity);
-	dolibarr_set_const($db, "MAIN_GENERATE_DOCUMENTS_SHOW_FOOT_DETAILS", GETPOST("MAIN_GENERATE_DOCUMENTS_SHOW_FOOT_DETAILS"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_DOCUMENTS_LOGO_HEIGHT')) dolibarr_set_const($db, "MAIN_DOCUMENTS_LOGO_HEIGHT", GETPOST("MAIN_DOCUMENTS_LOGO_HEIGHT", 'int'), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_INVERT_SENDER_RECIPIENT')) dolibarr_set_const($db, "MAIN_INVERT_SENDER_RECIPIENT", GETPOST("MAIN_INVERT_SENDER_RECIPIENT"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_PDF_USE_ISO_LOCATION')) dolibarr_set_const($db, "MAIN_PDF_USE_ISO_LOCATION", GETPOST("MAIN_PDF_USE_ISO_LOCATION"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_GENERATE_DOCUMENTS_SHOW_FOOT_DETAILS')) dolibarr_set_const($db, "MAIN_GENERATE_DOCUMENTS_SHOW_FOOT_DETAILS", GETPOST("MAIN_GENERATE_DOCUMENTS_SHOW_FOOT_DETAILS"), 'chaine', 0, '', $conf->entity);
 
-	dolibarr_set_const($db, "MAIN_PDF_MAIN_HIDE_SECOND_TAX", GETPOST("MAIN_PDF_MAIN_HIDE_SECOND_TAX"), 'chaine', 0, '', $conf->entity);
-	dolibarr_set_const($db, "MAIN_PDF_MAIN_HIDE_THIRD_TAX", GETPOST("MAIN_PDF_MAIN_HIDE_THIRD_TAX"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_PDF_MAIN_HIDE_SECOND_TAX')) dolibarr_set_const($db, "MAIN_PDF_MAIN_HIDE_SECOND_TAX", GETPOST("MAIN_PDF_MAIN_HIDE_SECOND_TAX"), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('MAIN_PDF_MAIN_HIDE_THIRD_TAX')) dolibarr_set_const($db, "MAIN_PDF_MAIN_HIDE_THIRD_TAX", GETPOST("MAIN_PDF_MAIN_HIDE_THIRD_TAX"), 'chaine', 0, '', $conf->entity);
 
-	dolibarr_set_const($db, "PDF_USE_ALSO_LANGUAGE_CODE", GETPOST('PDF_USE_ALSO_LANGUAGE_CODE', 'alpha'), 'chaine', 0, '', $conf->entity);
-	dolibarr_set_const($db, "SHOW_SUBPRODUCT_REF_IN_PDF", GETPOST('SHOW_SUBPRODUCT_REF_IN_PDF', 'alpha'), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('PDF_USE_ALSO_LANGUAGE_CODE')) dolibarr_set_const($db, "PDF_USE_ALSO_LANGUAGE_CODE", GETPOST('PDF_USE_ALSO_LANGUAGE_CODE', 'alpha'), 'chaine', 0, '', $conf->entity);
+	if (GETPOSTISSET('SHOW_SUBPRODUCT_REF_IN_PDF')) dolibarr_set_const($db, "SHOW_SUBPRODUCT_REF_IN_PDF", GETPOST('SHOW_SUBPRODUCT_REF_IN_PDF', 'alpha'), 'chaine', 0, '', $conf->entity);
 
 	setEventMessages($langs->trans("SetupSaved"), null, 'mesgs');
 
diff --git a/htdocs/core/class/CMailFile.class.php b/htdocs/core/class/CMailFile.class.php
index 5683c8e6a07..33db393bbc6 100644
--- a/htdocs/core/class/CMailFile.class.php
+++ b/htdocs/core/class/CMailFile.class.php
@@ -1628,7 +1628,7 @@ class CMailFile
 	 * @return  array                       array of email => name
 	 * @see getValidAddress()
 	 */
-	public function getArrayAddress($address)
+	public static function getArrayAddress($address)
 	{
 		global $conf;
 
diff --git a/htdocs/product/traduction.php b/htdocs/product/traduction.php
index b2c3b0d0b2f..0cae81e36c7 100644
--- a/htdocs/product/traduction.php
+++ b/htdocs/product/traduction.php
@@ -62,98 +62,108 @@ if ($object->id > 0) {
 	restrictedArea($user, 'produit|service', $fieldvalue, 'product&product', '', '', $fieldtype);
 }
 
+// Initialize technical object to manage hooks of page. Note that conf->hooks_modules contains array of hook context
+$hookmanager->initHooks(array('producttranslationcard', 'globalcard'));
+
 
 /*
  * Actions
  */
 
-// retour a l'affichage des traduction si annulation
-if ($cancel == $langs->trans("Cancel")) {
-	$action = '';
+$parameters = array('id'=>$id, 'ref'=>$ref);
+$reshook = $hookmanager->executeHooks('doActions', $parameters, $object, $action); // Note that $action and $object may have been modified by some hooks
+if ($reshook < 0) {
+	setEventMessages($hookmanager->error, $hookmanager->errors, 'errors');
 }
-
-if ($action == 'delete' && GETPOST('langtodelete', 'alpha')) {
-	$object = new Product($db);
-	$object->fetch($id);
-	$object->delMultiLangs(GETPOST('langtodelete', 'alpha'), $user);
-	setEventMessages($langs->trans("RecordDeleted"), null, 'mesgs');
-	$action = '';
-}
-
-// Add translation
-if ($action == 'vadd' && $cancel != $langs->trans("Cancel") && ($user->rights->produit->creer || $user->rights->service->creer)) {
-	$object = new Product($db);
-	$object->fetch($id);
-	$current_lang = $langs->getDefaultLang();
-
-	// update de l'objet
-	if (GETPOST("forcelangprod") == $current_lang) {
-		$object->label		 = GETPOST("libelle");
-		$object->description = dol_htmlcleanlastbr(GETPOST("desc", 'restricthtml'));
-		$object->other		 = dol_htmlcleanlastbr(GETPOST("other", 'restricthtml'));
-
-		$object->update($object->id, $user);
-	} else {
-		$object->multilangs[GETPOST("forcelangprod")]["label"]		= GETPOST("libelle");
-		$object->multilangs[GETPOST("forcelangprod")]["description"] = dol_htmlcleanlastbr(GETPOST("desc", 'restricthtml'));
-		$object->multilangs[GETPOST("forcelangprod")]["other"]		= dol_htmlcleanlastbr(GETPOST("other", 'restricthtml'));
-	}
-
-	// save in database
-	if (GETPOST("forcelangprod")) {
-		$result = $object->setMultiLangs($user);
-	} else {
-		$object->error = $langs->trans("ErrorFieldRequired", $langs->transnoentitiesnoconv("Language"));
-		$result = -1;
-	}
-
-	if ($result > 0) {
+if (empty($reshook)) {
+	// retour a l'affichage des traduction si annulation
+	if ($cancel == $langs->trans("Cancel")) {
 		$action = '';
-	} else {
-		$action = 'add';
-		setEventMessages($object->error, $object->errors, 'errors');
 	}
-}
 
-// Edit translation
-if ($action == 'vedit' && $cancel != $langs->trans("Cancel") && ($user->rights->produit->creer || $user->rights->service->creer)) {
-	$object = new Product($db);
-	$object->fetch($id);
-	$current_lang = $langs->getDefaultLang();
+	if ($action == 'delete' && GETPOST('langtodelete', 'alpha')) {
+		$object = new Product($db);
+		$object->fetch($id);
+		$object->delMultiLangs(GETPOST('langtodelete', 'alpha'), $user);
+		setEventMessages($langs->trans("RecordDeleted"), null, 'mesgs');
+		$action = '';
+	}
 
-	foreach ($object->multilangs as $key => $value) { // enregistrement des nouvelles valeurs dans l'objet
-		if ($key == $current_lang) {
-			$object->label		 = GETPOST("libelle-".$key);
-			$object->description = dol_htmlcleanlastbr(GETPOST("desc-".$key, 'restricthtml'));
-			$object->other		 = dol_htmlcleanlastbr(GETPOST("other-".$key, 'restricthtml'));
+	// Add translation
+	if ($action == 'vadd' && $cancel != $langs->trans("Cancel") && ($user->rights->produit->creer || $user->rights->service->creer)) {
+		$object = new Product($db);
+		$object->fetch($id);
+		$current_lang = $langs->getDefaultLang();
+
+		// update de l'objet
+		if (GETPOST("forcelangprod") == $current_lang) {
+			$object->label = GETPOST("libelle");
+			$object->description = dol_htmlcleanlastbr(GETPOST("desc", 'restricthtml'));
+			$object->other = dol_htmlcleanlastbr(GETPOST("other", 'restricthtml'));
+
+			$object->update($object->id, $user);
 		} else {
-			$object->multilangs[$key]["label"]		 = GETPOST("libelle-".$key);
-			$object->multilangs[$key]["description"] = dol_htmlcleanlastbr(GETPOST("desc-".$key, 'restricthtml'));
-			$object->multilangs[$key]["other"]		 = dol_htmlcleanlastbr(GETPOST("other-".$key, 'restricthtml'));
+			$object->multilangs[GETPOST("forcelangprod")]["label"] = GETPOST("libelle");
+			$object->multilangs[GETPOST("forcelangprod")]["description"] = dol_htmlcleanlastbr(GETPOST("desc", 'restricthtml'));
+			$object->multilangs[GETPOST("forcelangprod")]["other"] = dol_htmlcleanlastbr(GETPOST("other", 'restricthtml'));
+		}
+
+		// save in database
+		if (GETPOST("forcelangprod")) {
+			$result = $object->setMultiLangs($user);
+		} else {
+			$object->error = $langs->trans("ErrorFieldRequired", $langs->transnoentitiesnoconv("Language"));
+			$result = -1;
+		}
+
+		if ($result > 0) {
+			$action = '';
+		} else {
+			$action = 'add';
+			setEventMessages($object->error, $object->errors, 'errors');
 		}
 	}
 
-	$result = $object->setMultiLangs($user);
-	if ($result > 0) {
-		$action = '';
-	} else {
-		$action = 'edit';
-		setEventMessages($object->error, $object->errors, 'errors');
+	// Edit translation
+	if ($action == 'vedit' && $cancel != $langs->trans("Cancel") && ($user->rights->produit->creer || $user->rights->service->creer)) {
+		$object = new Product($db);
+		$object->fetch($id);
+		$current_lang = $langs->getDefaultLang();
+
+		foreach ($object->multilangs as $key => $value) { // enregistrement des nouvelles valeurs dans l'objet
+			if ($key == $current_lang) {
+				$object->label = GETPOST("libelle-" . $key);
+				$object->description = dol_htmlcleanlastbr(GETPOST("desc-" . $key, 'restricthtml'));
+				$object->other = dol_htmlcleanlastbr(GETPOST("other-" . $key, 'restricthtml'));
+			} else {
+				$object->multilangs[$key]["label"] = GETPOST("libelle-" . $key);
+				$object->multilangs[$key]["description"] = dol_htmlcleanlastbr(GETPOST("desc-" . $key, 'restricthtml'));
+				$object->multilangs[$key]["other"] = dol_htmlcleanlastbr(GETPOST("other-" . $key, 'restricthtml'));
+			}
+		}
+
+		$result = $object->setMultiLangs($user);
+		if ($result > 0) {
+			$action = '';
+		} else {
+			$action = 'edit';
+			setEventMessages($object->error, $object->errors, 'errors');
+		}
 	}
-}
 
-// Delete translation
-if ($action == 'vdelete' && $cancel != $langs->trans("Cancel") && ($user->rights->produit->creer || $user->rights->service->creer)) {
-	$object = new Product($db);
-	$object->fetch($id);
-	$langtodelete = GETPOST('langdel', 'alpha');
+	// Delete translation
+	if ($action == 'vdelete' && $cancel != $langs->trans("Cancel") && ($user->rights->produit->creer || $user->rights->service->creer)) {
+		$object = new Product($db);
+		$object->fetch($id);
+		$langtodelete = GETPOST('langdel', 'alpha');
 
-	$result = $object->delMultiLangs($langtodelete, $user);
-	if ($result > 0) {
-		$action = '';
-	} else {
-		$action = 'edit';
-		setEventMessages($object->error, $object->errors, 'errors');
+		$result = $object->delMultiLangs($langtodelete, $user);
+		if ($result > 0) {
+			$action = '';
+		} else {
+			$action = 'edit';
+			setEventMessages($object->error, $object->errors, 'errors');
+		}
 	}
 }
 
@@ -216,11 +226,15 @@ print dol_get_fiche_end();
  */
 print "\n".'<div class="tabsAction">'."\n";
 
-if ($action == '') {
-	if ($user->rights->produit->creer || $user->rights->service->creer) {
-		print '<a class="butAction" href="'.DOL_URL_ROOT.'/product/traduction.php?action=add&id='.$object->id.'">'.$langs->trans("Add").'</a>';
-		if ($cnt_trans > 0) {
-			print '<a class="butAction" href="'.DOL_URL_ROOT.'/product/traduction.php?action=edit&id='.$object->id.'">'.$langs->trans("Update").'</a>';
+$parameters = array();
+$reshook = $hookmanager->executeHooks('addMoreActionsButtons', $parameters, $object, $action); // Note that $action and $object may have been
+if (empty($reshook)) {
+	if ($action == '') {
+		if ($user->rights->produit->creer || $user->rights->service->creer) {
+			print '<a class="butAction" href="' . DOL_URL_ROOT . '/product/traduction.php?action=add&id=' . $object->id . '">' . $langs->trans("Add") . '</a>';
+			if ($cnt_trans > 0) {
+				print '<a class="butAction" href="' . DOL_URL_ROOT . '/product/traduction.php?action=edit&id=' . $object->id . '">' . $langs->trans("Update") . '</a>';
+			}
 		}
 	}
 }
@@ -263,6 +277,9 @@ if ($action == 'edit') {
 		}
 	}
 
+	$parameters = array();
+	$reshook = $hookmanager->executeHooks('formObjectOptions', $parameters, $object, $action); // Note that $action and $object may have been modified by hook
+
 	print '<br>';
 
 	print '<div class="center">';
@@ -334,6 +351,9 @@ if ($action == 'add' && ($user->rights->produit->creer || $user->rights->service
 	}
 	print '</table>';
 
+	$parameters = array();
+	$reshook = $hookmanager->executeHooks('formObjectOptions', $parameters, $object, $action); // Note that $action and $object may have been modified by hook
+
 	print dol_get_fiche_end();
 
 	print '<div class="center">';