From e78f9a56be9dd5322e14425f382376052c4cafd5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20France?= <frederic.france@free.fr>
Date: Tue, 23 Aug 2022 20:16:28 +0200
Subject: [PATCH] use isModEnabled

---
 htdocs/adherents/class/adherent.class.php     |  4 +-
 htdocs/asset/class/asset.class.php            |  8 ++--
 htdocs/comm/propal/card.php                   |  8 ++--
 htdocs/commande/card.php                      | 14 +++----
 htdocs/compta/facture/card-rec.php            |  8 ++--
 htdocs/compta/facture/card.php                | 32 +++++++--------
 htdocs/compta/facture/class/facture.class.php |  4 +-
 htdocs/compta/paiement/cheque/card.php        | 12 +++---
 .../compta/paiement/class/paiement.class.php  |  8 ++--
 htdocs/contrat/card.php                       |  8 ++--
 htdocs/core/actions_addupdatedelete.inc.php   | 12 +++---
 htdocs/core/actions_lineupdown.inc.php        |  8 ++--
 htdocs/core/actions_massactions.inc.php       | 14 +++----
 htdocs/core/actions_setnotes.inc.php          |  4 +-
 htdocs/core/class/html.formticket.class.php   |  4 +-
 htdocs/delivery/card.php                      |  4 +-
 htdocs/don/card.php                           |  8 ++--
 htdocs/expedition/card.php                    |  4 +-
 htdocs/expensereport/card.php                 | 40 +++++++++----------
 htdocs/fichinter/card.php                     | 28 ++++++-------
 .../fourn/class/fournisseur.facture.class.php |  4 +-
 htdocs/fourn/class/paiementfourn.class.php    |  2 +-
 htdocs/fourn/commande/card.php                | 20 +++++-----
 htdocs/fourn/facture/card.php                 | 24 +++++------
 htdocs/mrp/mo_card.php                        |  4 +-
 htdocs/mrp/mo_production.php                  |  4 +-
 .../class/partnershiputils.class.php          |  4 +-
 htdocs/partnership/partnership_card.php       |  8 ++--
 .../class/propalmergepdfproduct.class.php     |  2 +-
 htdocs/product/stock/movement_list.php        |  4 +-
 htdocs/reception/card.php                     | 16 ++++----
 htdocs/supplier_proposal/card.php             | 12 +++---
 htdocs/ticket/card.php                        |  4 +-
 33 files changed, 170 insertions(+), 170 deletions(-)

diff --git a/htdocs/adherents/class/adherent.class.php b/htdocs/adherents/class/adherent.class.php
index 1f93e87f1ab..5ecf5069915 100644
--- a/htdocs/adherents/class/adherent.class.php
+++ b/htdocs/adherents/class/adherent.class.php
@@ -1865,10 +1865,10 @@ class Adherent extends CommonObject
 				$outputlangs = $langs;
 				$newlang = '';
 				$lang_id = GETPOST('lang_id');
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && !empty($lang_id)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && !empty($lang_id)) {
 					$newlang = $lang_id;
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $customer->default_lang;
 				}
 				if (!empty($newlang)) {
diff --git a/htdocs/asset/class/asset.class.php b/htdocs/asset/class/asset.class.php
index d144d95819b..16306e73441 100644
--- a/htdocs/asset/class/asset.class.php
+++ b/htdocs/asset/class/asset.class.php
@@ -1171,10 +1171,10 @@ class Asset extends CommonObject
 				global $hidedetails, $hidedesc, $hideref;
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $this->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -1234,10 +1234,10 @@ class Asset extends CommonObject
 				global $hidedetails, $hidedesc, $hideref;
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $this->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
diff --git a/htdocs/comm/propal/card.php b/htdocs/comm/propal/card.php
index 690ed50536c..226e9ef6389 100644
--- a/htdocs/comm/propal/card.php
+++ b/htdocs/comm/propal/card.php
@@ -324,8 +324,8 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) $newlang = GETPOST('lang_id', 'aZ09');
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang))	$newlang = $object->thirdparty->default_lang;
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) $newlang = GETPOST('lang_id', 'aZ09');
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang))	$newlang = $object->thirdparty->default_lang;
 				if (!empty($newlang)) {
 					$outputlangs = new Translate("", $conf);
 					$outputlangs->setDefaultLang($newlang);
@@ -624,10 +624,10 @@ if (empty($reshook)) {
 						if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 							$outputlangs = $langs;
 							$newlang = '';
-							if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+							if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 								$newlang = GETPOST('lang_id', 'aZ09');
 							}
-							if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+							if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 								$newlang = $object->thirdparty->default_lang;
 							}
 							if (!empty($newlang)) {
diff --git a/htdocs/commande/card.php b/htdocs/commande/card.php
index 07344dae69a..b6e859689ec 100644
--- a/htdocs/commande/card.php
+++ b/htdocs/commande/card.php
@@ -220,10 +220,10 @@ if (empty($reshook)) {
 			// Define output language
 			$outputlangs = $langs;
 			$newlang = '';
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 				$newlang = GETPOST('lang_id', 'aZ09');
 			}
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 				$newlang = $object->thirdparty->default_lang;
 			}
 			if (!empty($newlang)) {
@@ -583,7 +583,7 @@ if (empty($reshook)) {
 				// Define output language
 				$outputlangs = $langs;
 				$newlang = GETPOST('lang_id', 'alpha');
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -1142,10 +1142,10 @@ if (empty($reshook)) {
 					// Define output language
 					$outputlangs = $langs;
 					$newlang = '';
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 						$newlang = GETPOST('lang_id', 'aZ09');
 					}
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 						$newlang = $object->thirdparty->default_lang;
 					}
 					if (!empty($newlang)) {
@@ -1310,10 +1310,10 @@ if (empty($reshook)) {
 				if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 					$outputlangs = $langs;
 					$newlang = '';
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 						$newlang = GETPOST('lang_id', 'aZ09');
 					}
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 						$newlang = $object->thirdparty->default_lang;
 					}
 					if (!empty($newlang)) {
diff --git a/htdocs/compta/facture/card-rec.php b/htdocs/compta/facture/card-rec.php
index 18a935cedb4..1ee81c2a2a0 100644
--- a/htdocs/compta/facture/card-rec.php
+++ b/htdocs/compta/facture/card-rec.php
@@ -650,8 +650,8 @@ if (empty($reshook)) {
 						// Define output language
 						$outputlangs = $langs;
 						$newlang = '';
-						if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id','aZ09')) $newlang = GETPOST('lang_id','aZ09');
-						if ($conf->global->MAIN_MULTILANGS && empty($newlang))	$newlang = $object->thirdparty->default_lang;
+						if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id','aZ09')) $newlang = GETPOST('lang_id','aZ09');
+						if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang))	$newlang = $object->thirdparty->default_lang;
 						if (! empty($newlang)) {
 						$outputlangs = new Translate("", $conf);
 						$outputlangs->setDefaultLang($newlang);
@@ -857,9 +857,9 @@ if (empty($reshook)) {
 						// Define output language
 						$outputlangs = $langs;
 						$newlang = '';
-						if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id','aZ09'))
+						if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id','aZ09'))
 							$newlang = GETPOST('lang_id','aZ09');
-							if ($conf->global->MAIN_MULTILANGS && empty($newlang))
+							if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang))
 								$newlang = $object->thirdparty->default_lang;
 								if (! empty($newlang)) {
 									$outputlangs = new Translate("", $conf);
diff --git a/htdocs/compta/facture/card.php b/htdocs/compta/facture/card.php
index d505f3dd718..6ad9c545dee 100644
--- a/htdocs/compta/facture/card.php
+++ b/htdocs/compta/facture/card.php
@@ -272,10 +272,10 @@ if (empty($reshook)) {
 			// Define output language
 			$outputlangs = $langs;
 			$newlang = '';
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id')) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id')) {
 				$newlang = GETPOST('lang_id');
 			}
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 				$newlang = $object->thirdparty->default_lang;
 			}
 			if (!empty($newlang)) {
@@ -520,10 +520,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -604,10 +604,10 @@ if (empty($reshook)) {
 		if (empty($error) && empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 			$outputlangs = $langs;
 			$newlang = '';
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 				$newlang = GETPOST('lang_id', 'aZ09');
 			}
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 				$newlang = $object->thirdparty->default_lang;
 			}
 			if (!empty($newlang)) {
@@ -659,10 +659,10 @@ if (empty($reshook)) {
 				if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 					$outputlangs = $langs;
 					$newlang = '';
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 						$newlang = GETPOST('lang_id', 'aZ09');
 					}
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 						$newlang = $object->thirdparty->default_lang;
 					}
 					if (!empty($newlang)) {
@@ -749,10 +749,10 @@ if (empty($reshook)) {
 					if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 						$outputlangs = $langs;
 						$newlang = '';
-						if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+						if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 							$newlang = GETPOST('lang_id', 'aZ09');
 						}
-						if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+						if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 							$newlang = $object->thirdparty->default_lang;
 						}
 						if (!empty($newlang)) {
@@ -1956,10 +1956,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE) && count($object->lines)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -2305,10 +2305,10 @@ if (empty($reshook)) {
 					if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 						$outputlangs = $langs;
 						$newlang = '';
-						if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+						if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 							$newlang = GETPOST('lang_id', 'aZ09');
 						}
-						if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+						if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 							$newlang = $object->thirdparty->default_lang;
 						}
 						if (!empty($newlang)) {
@@ -2555,10 +2555,10 @@ if (empty($reshook)) {
 					// Define output language
 					$outputlangs = $langs;
 					$newlang = '';
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 						$newlang = GETPOST('lang_id', 'aZ09');
 					}
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 						$newlang = $object->thirdparty->default_lang;
 					}
 					if (!empty($newlang)) {
diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index 91b5df73a00..0d2840adb97 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -598,10 +598,10 @@ class Facture extends CommonInvoice
 			$outputlangs = $langs;
 			$newlang = '';
 
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && isset($this->thirdparty->default_lang)) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && isset($this->thirdparty->default_lang)) {
 				$newlang = $this->thirdparty->default_lang; // for proposal, order, invoice, ...
 			}
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && isset($this->default_lang)) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && isset($this->default_lang)) {
 				$newlang = $this->default_lang; // for thirdparty
 			}
 			if (!empty($newlang)) {
diff --git a/htdocs/compta/paiement/cheque/card.php b/htdocs/compta/paiement/cheque/card.php
index f41ecd820ad..5409d3c381e 100644
--- a/htdocs/compta/paiement/cheque/card.php
+++ b/htdocs/compta/paiement/cheque/card.php
@@ -138,10 +138,10 @@ if ($action == 'create' && GETPOST("accountid", "int") > 0 && $user->rights->ban
 				// Define output language
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				//if ($conf->global->MAIN_MULTILANGS && empty($newlang)) $newlang=$object->client->default_lang;
+				//if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) $newlang=$object->client->default_lang;
 				if (!empty($newlang)) {
 					$outputlangs = new Translate("", $conf);
 					$outputlangs->setDefaultLang($newlang);
@@ -189,10 +189,10 @@ if ($action == 'confirm_validate' && $confirm == 'yes' && $user->rights->banque-
 		// Define output language
 		$outputlangs = $langs;
 		$newlang = '';
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 			$newlang = GETPOST('lang_id', 'aZ09');
 		}
-		//if ($conf->global->MAIN_MULTILANGS && empty($newlang)) $newlang=$object->client->default_lang;
+		//if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) $newlang=$object->client->default_lang;
 		if (!empty($newlang)) {
 			$outputlangs = new Translate("", $conf);
 			$outputlangs->setDefaultLang($newlang);
@@ -231,10 +231,10 @@ if ($action == 'builddoc' && $user->rights->banque->cheque) {
 
 	$outputlangs = $langs;
 	$newlang = '';
-	if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+	if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 		$newlang = GETPOST('lang_id', 'aZ09');
 	}
-	//if ($conf->global->MAIN_MULTILANGS && empty($newlang)) $newlang=$object->client->default_lang;
+	//if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) $newlang=$object->client->default_lang;
 	if (!empty($newlang)) {
 		$outputlangs = new Translate("", $conf);
 		$outputlangs->setDefaultLang($newlang);
diff --git a/htdocs/compta/paiement/class/paiement.class.php b/htdocs/compta/paiement/class/paiement.class.php
index 6f83f9ebc0b..6186083c211 100644
--- a/htdocs/compta/paiement/class/paiement.class.php
+++ b/htdocs/compta/paiement/class/paiement.class.php
@@ -8,7 +8,7 @@
  * Copyright (C) 2015       Juanjo Menent		 <jmenent@2byte.es>
  * Copyright (C) 2018       Ferran Marcet		 <fmarcet@2byte.es>
  * Copyright (C) 2018       Thibault FOUCART		 <support@ptibogxiv.net>
- * Copyright (C) 2018       Frédéric France         <frederic.france@netlogic.fr>
+ * Copyright (C) 2018-2022  Frédéric France         <frederic.france@netlogic.fr>
  * Copyright (C) 2020       Andreu Bisquerra Gaya <jove@bisquerra.com>
  * Copyright (C) 2021       OpenDsi					<support@open-dsi.fr>
  *
@@ -455,7 +455,7 @@ class Paiement extends CommonObject
 
 							$newlang = '';
 							$outputlangs = $langs;
-							if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+							if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 								$invoice->fetch_thirdparty();
 								$newlang = $invoice->thirdparty->default_lang;
 							}
@@ -464,8 +464,8 @@ class Paiement extends CommonObject
 								$outputlangs->setDefaultLang($newlang);
 							}
 
-							$hidedetails = ! empty($conf->global->MAIN_GENERATE_DOCUMENTS_HIDE_DETAILS) ? 1 : 0;
-							$hidedesc = ! empty($conf->global->MAIN_GENERATE_DOCUMENTS_HIDE_DESC) ? 1 : 0;
+							$hidedetails = !empty($conf->global->MAIN_GENERATE_DOCUMENTS_HIDE_DETAILS) ? 1 : 0;
+							$hidedesc = !empty($conf->global->MAIN_GENERATE_DOCUMENTS_HIDE_DESC) ? 1 : 0;
 							$hideref = !empty($conf->global->MAIN_GENERATE_DOCUMENTS_HIDE_REF) ? 1 : 0;
 
 							$ret = $invoice->fetch($facid); // Reload to get new records
diff --git a/htdocs/contrat/card.php b/htdocs/contrat/card.php
index 8c2dbad409d..9b25e710d85 100644
--- a/htdocs/contrat/card.php
+++ b/htdocs/contrat/card.php
@@ -577,10 +577,10 @@ if (empty($reshook)) {
 				if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE) && !empty($conf->global->CONTRACT_ADDON_PDF)) {    // No generation if default type not defined
 					$outputlangs = $langs;
 					$newlang = '';
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 						$newlang = GETPOST('lang_id', 'aZ09');
 					}
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 						$newlang = $object->thirdparty->default_lang;
 					}
 					if (!empty($newlang)) {
@@ -754,10 +754,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
diff --git a/htdocs/core/actions_addupdatedelete.inc.php b/htdocs/core/actions_addupdatedelete.inc.php
index 39dba81976f..c7dffe08691 100644
--- a/htdocs/core/actions_addupdatedelete.inc.php
+++ b/htdocs/core/actions_addupdatedelete.inc.php
@@ -366,10 +366,10 @@ if ($action == 'confirm_deleteline' && $confirm == 'yes' && !empty($permissionto
 		// Define output language
 		$outputlangs = $langs;
 		$newlang = '';
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 			$newlang = GETPOST('lang_id', 'aZ09');
 		}
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang) && is_object($object->thirdparty)) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && is_object($object->thirdparty)) {
 			$newlang = $object->thirdparty->default_lang;
 		}
 		if (!empty($newlang)) {
@@ -442,10 +442,10 @@ if ($action == 'confirm_close' && $confirm == 'yes' && $permissiontoadd) {
 			if (method_exists($object, 'generateDocument')) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -486,10 +486,10 @@ if ($action == 'confirm_reopen' && $confirm == 'yes' && $permissiontoadd) {
 			if (method_exists($object, 'generateDocument')) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
diff --git a/htdocs/core/actions_lineupdown.inc.php b/htdocs/core/actions_lineupdown.inc.php
index 5aee952292b..d41f1f1932c 100644
--- a/htdocs/core/actions_lineupdown.inc.php
+++ b/htdocs/core/actions_lineupdown.inc.php
@@ -34,10 +34,10 @@ if ($action == 'up' && $permissiontoedit) {
 	// Define output language
 	$outputlangs = $langs;
 	$newlang = '';
-	if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+	if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 		$newlang = GETPOST('lang_id', 'aZ09');
 	}
-	if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+	if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 		$newlang = $object->thirdparty->default_lang;
 	}
 	if (!empty($newlang)) {
@@ -59,10 +59,10 @@ if ($action == 'down' && $permissiontoedit) {
 	// Define output language
 	$outputlangs = $langs;
 	$newlang = '';
-	if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+	if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 		$newlang = GETPOST('lang_id', 'aZ09');
 	}
-	if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+	if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 		$newlang = $object->thirdparty->default_lang;
 	}
 	if (!empty($newlang)) {
diff --git a/htdocs/core/actions_massactions.inc.php b/htdocs/core/actions_massactions.inc.php
index a66c9b895b7..3f74ba7fdb2 100644
--- a/htdocs/core/actions_massactions.inc.php
+++ b/htdocs/core/actions_massactions.inc.php
@@ -763,10 +763,10 @@ if (!$error && $massaction == "builddoc" && $permissiontoread && !GETPOST('butto
 	// Define output language (Here it is not used because we do only merging existing PDF)
 	$outputlangs = $langs;
 	$newlang = '';
-	if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+	if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 		$newlang = GETPOST('lang_id', 'aZ09');
 	}
-	//elseif ($conf->global->MAIN_MULTILANGS && empty($newlang) && is_object($objecttmp->thirdparty)) {		// On massaction, we can have several values for $objecttmp->thirdparty
+	//elseif (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && is_object($objecttmp->thirdparty)) {		// On massaction, we can have several values for $objecttmp->thirdparty
 	//	$newlang = $objecttmp->thirdparty->default_lang;
 	//}
 	if (!empty($newlang)) {
@@ -965,10 +965,10 @@ if (!$error && $massaction == 'validate' && $permissiontoadd) {
 					if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 						$outputlangs = $langs;
 						$newlang = '';
-						if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+						if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 							$newlang = GETPOST('lang_id', 'aZ09');
 						}
-						if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+						if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 							$newlang = $objecttmp->thirdparty->default_lang;
 						}
 						if (!empty($newlang)) {
@@ -1116,13 +1116,13 @@ if (!$error && $massaction == 'generate_doc' && $permissiontoread) {
 			$outputlangs = $langs;
 			$newlang = '';
 
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 				$newlang = GETPOST('lang_id', 'aZ09');
 			}
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && isset($objecttmp->thirdparty->default_lang)) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && isset($objecttmp->thirdparty->default_lang)) {
 				$newlang = $objecttmp->thirdparty->default_lang; // for proposal, order, invoice, ...
 			}
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && isset($objecttmp->default_lang)) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && isset($objecttmp->default_lang)) {
 				$newlang = $objecttmp->default_lang; // for thirdparty
 			}
 			if (!empty($newlang)) {
diff --git a/htdocs/core/actions_setnotes.inc.php b/htdocs/core/actions_setnotes.inc.php
index 91e7f4a8aca..7595daf1093 100644
--- a/htdocs/core/actions_setnotes.inc.php
+++ b/htdocs/core/actions_setnotes.inc.php
@@ -45,10 +45,10 @@ if ($action == 'setnote_public' && !empty($permissionnote) && !GETPOST('cancel',
 		if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 			$outputlangs = $langs;
 			$newlang = '';
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 				$newlang = GETPOST('lang_id', 'aZ09');
 			}
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 				$newlang = $object->thirdparty->default_lang;
 			}
 			if (!empty($newlang)) {
diff --git a/htdocs/core/class/html.formticket.class.php b/htdocs/core/class/html.formticket.class.php
index 68cb3d1af84..83071830ae7 100644
--- a/htdocs/core/class/html.formticket.class.php
+++ b/htdocs/core/class/html.formticket.class.php
@@ -1259,7 +1259,7 @@ class FormTicket
 		// Define output language
 		$outputlangs = $langs;
 		$newlang = '';
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 			$newlang = $this->param['langsmodels'];
 		}
 		if (!empty($newlang)) {
@@ -1306,7 +1306,7 @@ class FormTicket
 		// Define output language
 		$outputlangs = $langs;
 		$newlang = '';
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 			$newlang = $this->param['langsmodels'];
 		}
 		if (!empty($newlang)) {
diff --git a/htdocs/delivery/card.php b/htdocs/delivery/card.php
index ac2aaa9b4e9..0b216df80a1 100644
--- a/htdocs/delivery/card.php
+++ b/htdocs/delivery/card.php
@@ -142,10 +142,10 @@ if ($action == 'add') {
 	if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 		$outputlangs = $langs;
 		$newlang = '';
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 			$newlang = GETPOST('lang_id', 'aZ09');
 		}
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 			$newlang = $object->thirdparty->default_lang;
 		}
 		if (!empty($newlang)) {
diff --git a/htdocs/don/card.php b/htdocs/don/card.php
index 8f7ea3be1df..a622167819e 100644
--- a/htdocs/don/card.php
+++ b/htdocs/don/card.php
@@ -119,10 +119,10 @@ if (empty($reshook)) {
 				if (method_exists($object, 'generateDocument')) {
 					$outputlangs = $langs;
 					$newlang = '';
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 						$newlang = GETPOST('lang_id', 'aZ09');
 					}
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 						$newlang = $object->thirdparty->default_lang;
 					}
 					if (!empty($newlang)) {
@@ -351,8 +351,8 @@ if (empty($reshook)) {
 		// Define output language
 		$outputlangs = $langs;
 		$newlang='';
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang) && ! empty($_REQUEST['lang_id'])) $newlang=$_REQUEST['lang_id'];
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang)) $newlang=$object->thirdparty->default_lang;
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && ! empty($_REQUEST['lang_id'])) $newlang=$_REQUEST['lang_id'];
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) $newlang=$object->thirdparty->default_lang;
 		if (! empty($newlang))
 		{
 			$outputlangs = new Translate("",$conf);
diff --git a/htdocs/expedition/card.php b/htdocs/expedition/card.php
index 62e8b4337d3..3a0a9869571 100644
--- a/htdocs/expedition/card.php
+++ b/htdocs/expedition/card.php
@@ -763,10 +763,10 @@ if (empty($reshook)) {
 				// Define output language
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
diff --git a/htdocs/expensereport/card.php b/htdocs/expensereport/card.php
index 650457cbcc7..4110ba98e1b 100644
--- a/htdocs/expensereport/card.php
+++ b/htdocs/expensereport/card.php
@@ -383,10 +383,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -493,10 +493,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -603,10 +603,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -717,10 +717,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -831,10 +831,10 @@ if (empty($reshook)) {
 					if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 						$outputlangs = $langs;
 						$newlang = '';
-						if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+						if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 							$newlang = GETPOST('lang_id', 'aZ09');
 						}
-						if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+						if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 							$newlang = $object->thirdparty->default_lang;
 						}
 						if (!empty($newlang)) {
@@ -943,10 +943,10 @@ if (empty($reshook)) {
 				if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 					$outputlangs = $langs;
 					$newlang = '';
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 						$newlang = GETPOST('lang_id', 'aZ09');
 					}
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 						$newlang = $object->thirdparty->default_lang;
 					}
 					if (!empty($newlang)) {
@@ -982,10 +982,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -1011,10 +1011,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -1229,10 +1229,10 @@ if (empty($reshook)) {
 				if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 					$outputlangs = $langs;
 					$newlang = '';
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 						$newlang = GETPOST('lang_id', 'aZ09');
 					}
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 						$newlang = $object->thirdparty->default_lang;
 					}
 					if (!empty($newlang)) {
@@ -1321,10 +1321,10 @@ if (empty($reshook)) {
 					if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 						$outputlangs = $langs;
 						$newlang = '';
-						if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+						if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 							$newlang = GETPOST('lang_id', 'aZ09');
 						}
-						if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+						if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 							$newlang = $object->thirdparty->default_lang;
 						}
 						if (!empty($newlang)) {
diff --git a/htdocs/fichinter/card.php b/htdocs/fichinter/card.php
index d3adde8c21a..e2d03790f78 100644
--- a/htdocs/fichinter/card.php
+++ b/htdocs/fichinter/card.php
@@ -173,10 +173,10 @@ if (empty($reshook)) {
 				// Define output language
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -198,10 +198,10 @@ if (empty($reshook)) {
 				// Define output language
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -516,10 +516,10 @@ if (empty($reshook)) {
 			// Define output language
 			$outputlangs = $langs;
 			$newlang = '';
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 				$newlang = GETPOST('lang_id', 'aZ09');
 			}
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 				$newlang = $object->thirdparty->default_lang;
 			}
 			if (!empty($newlang)) {
@@ -612,10 +612,10 @@ if (empty($reshook)) {
 		// Define output language
 		$outputlangs = $langs;
 		$newlang = '';
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 			$newlang = GETPOST('lang_id', 'aZ09');
 		}
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 			$newlang = $object->thirdparty->default_lang;
 		}
 		if (!empty($newlang)) {
@@ -645,10 +645,10 @@ if (empty($reshook)) {
 		// Define output language
 		$outputlangs = $langs;
 		$newlang = '';
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 			$newlang = GETPOST('lang_id', 'aZ09');
 		}
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 			$newlang = $object->thirdparty->default_lang;
 		}
 		if (!empty($newlang)) {
@@ -665,10 +665,10 @@ if (empty($reshook)) {
 		// Define output language
 		$outputlangs = $langs;
 		$newlang = '';
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 			$newlang = GETPOST('lang_id', 'aZ09');
 		}
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 			$newlang = $object->thirdparty->default_lang;
 		}
 		if (!empty($newlang)) {
@@ -687,10 +687,10 @@ if (empty($reshook)) {
 		// Define output language
 		$outputlangs = $langs;
 		$newlang = '';
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 			$newlang = GETPOST('lang_id', 'aZ09');
 		}
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 			$newlang = $object->thirdparty->default_lang;
 		}
 		if (!empty($newlang)) {
diff --git a/htdocs/fourn/class/fournisseur.facture.class.php b/htdocs/fourn/class/fournisseur.facture.class.php
index 2135c66dfee..830430f3730 100644
--- a/htdocs/fourn/class/fournisseur.facture.class.php
+++ b/htdocs/fourn/class/fournisseur.facture.class.php
@@ -504,10 +504,10 @@ class FactureFournisseur extends CommonInvoice
 			$outputlangs = $langs;
 			$newlang = '';
 
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && isset($this->thirdparty->default_lang)) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && isset($this->thirdparty->default_lang)) {
 				$newlang = $this->thirdparty->default_lang; // for proposal, order, invoice, ...
 			}
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && isset($this->default_lang)) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && isset($this->default_lang)) {
 				$newlang = $this->default_lang; // for thirdparty
 			}
 			if (! empty($newlang)) {
diff --git a/htdocs/fourn/class/paiementfourn.class.php b/htdocs/fourn/class/paiementfourn.class.php
index 8fc181e18e0..386c34483de 100644
--- a/htdocs/fourn/class/paiementfourn.class.php
+++ b/htdocs/fourn/class/paiementfourn.class.php
@@ -349,7 +349,7 @@ class PaiementFourn extends Paiement
 							if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 								$newlang = '';
 								$outputlangs = $langs;
-								if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+								if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 									$newlang = $invoice->thirdparty->default_lang;
 								}
 								if (!empty($newlang)) {
diff --git a/htdocs/fourn/commande/card.php b/htdocs/fourn/commande/card.php
index c939c3433aa..31312c17d5b 100644
--- a/htdocs/fourn/commande/card.php
+++ b/htdocs/fourn/commande/card.php
@@ -846,10 +846,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -884,10 +884,10 @@ if (empty($reshook)) {
 			// Define output language
 			$outputlangs = $langs;
 			$newlang = '';
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 				$newlang = GETPOST('lang_id', 'aZ09');
 			}
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 				$newlang = $object->thirdparty->default_lang;
 			}
 			if (!empty($newlang)) {
@@ -926,10 +926,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -989,10 +989,10 @@ if (empty($reshook)) {
 				if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 					$outputlangs = $langs;
 					$newlang = '';
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 						$newlang = GETPOST('lang_id', 'aZ09');
 					}
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 						$newlang = $object->thirdparty->default_lang;
 					}
 					if (!empty($newlang)) {
@@ -1050,10 +1050,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
diff --git a/htdocs/fourn/facture/card.php b/htdocs/fourn/facture/card.php
index dbb20c72d77..ddf54ba0727 100644
--- a/htdocs/fourn/facture/card.php
+++ b/htdocs/fourn/facture/card.php
@@ -229,10 +229,10 @@ if (empty($reshook)) {
 				if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 					$outputlangs = $langs;
 					$newlang = '';
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 						$newlang = GETPOST('lang_id', 'aZ09');
 					}
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 						$newlang = $object->thirdparty->default_lang;
 					}
 					if (!empty($newlang)) {
@@ -273,9 +273,9 @@ if (empty($reshook)) {
 			// Define output language
 			/*$outputlangs = $langs;
 			$newlang = '';
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id','aZ09'))
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id','aZ09'))
 				$newlang = GETPOST('lang_id','aZ09');
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang))
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang))
 				$newlang = $object->thirdparty->default_lang;
 			if (! empty($newlang)) {
 				$outputlangs = new Translate("", $conf);
@@ -342,10 +342,10 @@ if (empty($reshook)) {
 			// Define output language
 			$outputlangs = $langs;
 			$newlang = '';
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 				$newlang = GETPOST('lang_id', 'aZ09');
 			}
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 				$newlang = $object->thirdparty->default_lang;
 			}
 			if (!empty($newlang)) {
@@ -501,10 +501,10 @@ if (empty($reshook)) {
 		if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 			$outputlangs = $langs;
 			$newlang = '';
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 				$newlang = GETPOST('lang_id', 'aZ09');
 			}
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 				$newlang = $object->thirdparty->default_lang;
 			}
 			if (!empty($newlang)) {
@@ -1648,10 +1648,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -1748,10 +1748,10 @@ if (empty($reshook)) {
 				if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 					$outputlangs = $langs;
 					$newlang = '';
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 						$newlang = GETPOST('lang_id', 'aZ09');
 					}
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 						$newlang = $object->thirdparty->default_lang;
 					}
 					if (!empty($newlang)) {
diff --git a/htdocs/mrp/mo_card.php b/htdocs/mrp/mo_card.php
index 2c333ff616e..032f9a7961c 100644
--- a/htdocs/mrp/mo_card.php
+++ b/htdocs/mrp/mo_card.php
@@ -202,10 +202,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
diff --git a/htdocs/mrp/mo_production.php b/htdocs/mrp/mo_production.php
index d6fc14b33ae..0f734df6ae9 100644
--- a/htdocs/mrp/mo_production.php
+++ b/htdocs/mrp/mo_production.php
@@ -396,10 +396,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
diff --git a/htdocs/partnership/class/partnershiputils.class.php b/htdocs/partnership/class/partnershiputils.class.php
index 9ad2e5b7ca2..874059431e1 100644
--- a/htdocs/partnership/class/partnershiputils.class.php
+++ b/htdocs/partnership/class/partnershiputils.class.php
@@ -157,7 +157,7 @@ class PartnershipUtils
 							// Define output language
 							$outputlangs = $langs;
 							$newlang = '';
-							if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) $newlang = GETPOST('lang_id', 'aZ09');
+							if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) $newlang = GETPOST('lang_id', 'aZ09');
 							if (!empty($newlang)) {
 								$outputlangs = new Translate("", $conf);
 								$outputlangs->setDefaultLang($newlang);
@@ -323,7 +323,7 @@ class PartnershipUtils
 								// Define output language
 								$outputlangs = $langs;
 								$newlang = '';
-								if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) $newlang = GETPOST('lang_id', 'aZ09');
+								if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) $newlang = GETPOST('lang_id', 'aZ09');
 								if (!empty($newlang)) {
 									$outputlangs = new Translate("", $conf);
 									$outputlangs->setDefaultLang($newlang);
diff --git a/htdocs/partnership/partnership_card.php b/htdocs/partnership/partnership_card.php
index 25f8b286fb5..fb826efcd91 100644
--- a/htdocs/partnership/partnership_card.php
+++ b/htdocs/partnership/partnership_card.php
@@ -129,10 +129,10 @@ if (empty($reshook)) {
 				if (method_exists($object, 'generateDocument')) {
 					$outputlangs = $langs;
 					$newlang = '';
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 						$newlang = GETPOST('lang_id', 'aZ09');
 					}
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 						$newlang = $object->thirdparty->default_lang;
 					}
 					if (!empty($newlang)) {
@@ -161,10 +161,10 @@ if (empty($reshook)) {
 				if (method_exists($object, 'generateDocument')) {
 					$outputlangs = $langs;
 					$newlang = '';
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 						$newlang = GETPOST('lang_id', 'aZ09');
 					}
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 						$newlang = $object->thirdparty->default_lang;
 					}
 					if (!empty($newlang)) {
diff --git a/htdocs/product/class/propalmergepdfproduct.class.php b/htdocs/product/class/propalmergepdfproduct.class.php
index 00c492f91de..e69c75c7336 100644
--- a/htdocs/product/class/propalmergepdfproduct.class.php
+++ b/htdocs/product/class/propalmergepdfproduct.class.php
@@ -403,7 +403,7 @@ class Propalmergepdfproduct extends CommonObject
 			$sql = "DELETE FROM ".$this->db->prefix()."propal_merge_pdf_product";
 			$sql .= " WHERE fk_product = ".((int) $product_id);
 
-			if ($conf->global->MAIN_MULTILANGS && !empty($lang_id)) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && !empty($lang_id)) {
 				$sql .= " AND lang = '".$this->db->escape($lang_id)."'";
 			}
 
diff --git a/htdocs/product/stock/movement_list.php b/htdocs/product/stock/movement_list.php
index ad7be8d674b..9f097e1c4e3 100644
--- a/htdocs/product/stock/movement_list.php
+++ b/htdocs/product/stock/movement_list.php
@@ -268,10 +268,10 @@ if (empty($reshook)) {
 		// Define output language (Here it is not used because we do only merging existing PDF)
 		$outputlangs = $langs;
 		$newlang = '';
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 			$newlang = GETPOST('lang_id', 'aZ09');
 		}
-		//elseif ($conf->global->MAIN_MULTILANGS && empty($newlang) && is_object($objecttmp->thirdparty)) {		// On massaction, we can have several values for $objecttmp->thirdparty
+		//elseif (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && is_object($objecttmp->thirdparty)) {		// On massaction, we can have several values for $objecttmp->thirdparty
 		//	$newlang = $objecttmp->thirdparty->default_lang;
 		//}
 		if (!empty($newlang)) {
diff --git a/htdocs/reception/card.php b/htdocs/reception/card.php
index 279dad1dfac..e548beca63c 100644
--- a/htdocs/reception/card.php
+++ b/htdocs/reception/card.php
@@ -198,10 +198,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -436,10 +436,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -531,10 +531,10 @@ if (empty($reshook)) {
 		// Define output language
 		$outputlangs = $langs;
 		$newlang = '';
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 			$newlang = GETPOST('lang_id', 'aZ09');
 		}
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+		if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 			$newlang = $reception->thirdparty->default_lang;
 		}
 		if (!empty($newlang)) {
@@ -666,10 +666,10 @@ if (empty($reshook)) {
 				// Define output language
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
diff --git a/htdocs/supplier_proposal/card.php b/htdocs/supplier_proposal/card.php
index b3ea48aef44..e4c2efd2c72 100644
--- a/htdocs/supplier_proposal/card.php
+++ b/htdocs/supplier_proposal/card.php
@@ -221,10 +221,10 @@ if (empty($reshook)) {
 				if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 					$outputlangs = $langs;
 					$newlang = '';
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 						$newlang = GETPOST('lang_id', 'aZ09');
 					}
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 						$newlang = $object->thirdparty->default_lang;
 					}
 					if (!empty($newlang)) {
@@ -448,10 +448,10 @@ if (empty($reshook)) {
 						if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 							$outputlangs = $langs;
 							$newlang = '';
-							if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+							if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 								$newlang = GETPOST('lang_id', 'aZ09');
 							}
-							if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+							if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 								$newlang = $object->thirdparty->default_lang;
 							}
 							if (!empty($newlang)) {
@@ -841,10 +841,10 @@ if (empty($reshook)) {
 				if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 					$outputlangs = $langs;
 					$newlang = '';
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 						$newlang = GETPOST('lang_id', 'aZ09');
 					}
-					if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+					if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 						$newlang = $object->thirdparty->default_lang;
 					}
 					if (!empty($newlang)) {
diff --git a/htdocs/ticket/card.php b/htdocs/ticket/card.php
index d33a37343bd..8b76f5968cb 100755
--- a/htdocs/ticket/card.php
+++ b/htdocs/ticket/card.php
@@ -1473,9 +1473,9 @@ if ($action == 'create' || $action == 'presend') {
 
 			$outputlangs = $langs;
 			$newlang = '';
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+			if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 				$newlang = GETPOST('lang_id', 'aZ09');
-			} elseif ($conf->global->MAIN_MULTILANGS && empty($newlang) && is_object($object->thirdparty)) {
+			} elseif (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && is_object($object->thirdparty)) {
 				$newlang = $object->thirdparty->default_lang;
 			}
 			if (!empty($newlang)) {