diff --git a/htdocs/core/boxes/box_produits.php b/htdocs/core/boxes/box_produits.php
index 19f9724cc98..f036628db3b 100644
--- a/htdocs/core/boxes/box_produits.php
+++ b/htdocs/core/boxes/box_produits.php
@@ -119,7 +119,7 @@ class box_produits extends ModeleBoxes
 					$datem = $this->db->jdate($objp->tms);
 
 					// Multilangs
-					if (!empty($conf->global->MAIN_MULTILANGS)) { // si l'option est active
+					if (getDolGlobalInt('MAIN_MULTILANGS')) { // si l'option est active
 						$sqld = "SELECT label";
 						$sqld .= " FROM ".MAIN_DB_PREFIX."product_lang";
 						$sqld .= " WHERE fk_product = ".((int) $objp->rowid);
diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index 9e488b2eafa..7f30878d566 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -4989,7 +4989,7 @@ abstract class CommonObject
 				$text = $product_static->getNomUrl(1);
 
 				// Define output language and label
-				if (!empty($conf->global->MAIN_MULTILANGS)) {
+				if (getDolGlobalInt('MAIN_MULTILANGS')) {
 					if (property_exists($this, 'socid') && !is_object($this->thirdparty)) {
 						dol_print_error('', 'Error: Method printObjectLine was called on an object and object->fetch_thirdparty was not done before');
 						return;
diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index a241aa367cf..14236b5e332 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -2562,7 +2562,7 @@ class Form
 		}
 
 		// Multilang : we add translation
-		if (!empty($conf->global->MAIN_MULTILANGS)) {
+		if (getDolGlobalInt('MAIN_MULTILANGS')) {
 			$sql .= ", pl.label as label_translated";
 			$sql .= ", pl.description as description_translated";
 			$selectFields .= ", label_translated";
@@ -2605,7 +2605,7 @@ class Form
 			$sql .= " LEFT JOIN ".$this->db->prefix()."c_units u ON u.rowid = p.fk_unit";
 		}
 		// Multilang : we add translation
-		if (!empty($conf->global->MAIN_MULTILANGS)) {
+		if (getDolGlobalInt('MAIN_MULTILANGS')) {
 			$sql .= " LEFT JOIN ".$this->db->prefix()."product_lang as pl ON pl.fk_product = p.rowid ";
 			if (!empty($conf->global->PRODUIT_TEXTS_IN_THIRDPARTY_LANGUAGE) && !empty($socid)) {
 				require_once DOL_DOCUMENT_ROOT.'/societe/class/societe.class.php';
@@ -2671,7 +2671,7 @@ class Form
 					$sql .= " AND ";
 				}
 				$sql .= "(p.ref LIKE '".$this->db->escape($prefix.$crit)."%' OR p.label LIKE '".$this->db->escape($prefix.$crit)."%'";
-				if (!empty($conf->global->MAIN_MULTILANGS)) {
+				if (getDolGlobalInt('MAIN_MULTILANGS')) {
 					$sql .= " OR pl.label LIKE '".$this->db->escape($prefix.$crit)."%'";
 				}
 				if (!empty($conf->global->PRODUIT_CUSTOMER_PRICES) && !empty($socid)) {
@@ -2679,7 +2679,7 @@ class Form
 				}
 				if (!empty($conf->global->PRODUCT_AJAX_SEARCH_ON_DESCRIPTION)) {
 					$sql .= " OR p.description LIKE '".$this->db->escape($prefix.$crit)."%'";
-					if (!empty($conf->global->MAIN_MULTILANGS)) {
+					if (getDolGlobalInt('MAIN_MULTILANGS')) {
 						$sql .= " OR pl.description LIKE '".$this->db->escape($prefix.$crit)."%'";
 					}
 				}
@@ -2885,7 +2885,7 @@ class Form
 		$outrefcust = empty($objp->custref) ? '' : $objp->custref;
 		$outlabel = $objp->label;
 		$outdesc = $objp->description;
-		if (!empty($conf->global->MAIN_MULTILANGS)) {
+		if (getDolGlobalInt('MAIN_MULTILANGS')) {
 			$outlabel_translated = $objp->label_translated;
 			$outdesc_translated = $objp->description_translated;
 		}
diff --git a/htdocs/core/class/html.formfile.class.php b/htdocs/core/class/html.formfile.class.php
index a01f15c5479..675300169e4 100644
--- a/htdocs/core/class/html.formfile.class.php
+++ b/htdocs/core/class/html.formfile.class.php
@@ -728,7 +728,7 @@ class FormFile
 			}
 
 			// Language code (if multilang)
-			if (($allowgenifempty || (is_array($modellist) && count($modellist) > 0)) && !empty($conf->global->MAIN_MULTILANGS) && !$forcenomultilang && (!empty($modellist) || $showempty)) {
+			if (($allowgenifempty || (is_array($modellist) && count($modellist) > 0)) && getDolGlobalInt('MAIN_MULTILANGS') && !$forcenomultilang && (!empty($modellist) || $showempty)) {
 				include_once DOL_DOCUMENT_ROOT.'/core/class/html.formadmin.class.php';
 				$formadmin = new FormAdmin($this->db);
 				$defaultlang = ($codelang && $codelang != 'auto') ? $codelang : $langs->getDefaultLang();