diff --git a/htdocs/core/class/html.formticket.class.php b/htdocs/core/class/html.formticket.class.php
index 5cad99b2a9f..7ed11bb81e8 100644
--- a/htdocs/core/class/html.formticket.class.php
+++ b/htdocs/core/class/html.formticket.class.php
@@ -727,8 +727,8 @@ class FormTicket
     {
         global $conf, $langs, $user, $mysoc;
 
-        $langs->load("other");
-        $langs->load("mails");
+        // Load translation files required by the page
+        $langs->loadLangs(array('other', 'mails'));
 
         $addfileaction = 'addfile';
 
diff --git a/htdocs/core/lib/files.lib.php b/htdocs/core/lib/files.lib.php
index 432c857850b..4df32ca4a35 100644
--- a/htdocs/core/lib/files.lib.php
+++ b/htdocs/core/lib/files.lib.php
@@ -1141,8 +1141,8 @@ function dol_delete_file($file,$disableglob=0,$nophperrors=0,$nohook=0,$object=n
 	global $db, $conf, $user, $langs;
 	global $hookmanager;
 
-	$langs->load("other");
-	$langs->load("errors");
+	// Load translation files required by the page
+    $langs->loadLangs(array('other', 'errors'));
 
 	dol_syslog("dol_delete_file file=".$file." disableglob=".$disableglob." nophperrors=".$nophperrors." nohook=".$nohook);
 
diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index a73a107c0dc..e648a89f6ed 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -3865,8 +3865,8 @@ function dol_print_error($db='',$error='',$errors=null)
 		$langs = new Translate('', $conf);
 		$langs->load("main");
 	}
-	$langs->load("main");
-	$langs->load("errors");
+	// Load translation files required by the page
+    $langs->loadLangs(array('main', 'errors'));
 
 	if ($_SERVER['DOCUMENT_ROOT'])    // Mode web
 	{
diff --git a/htdocs/core/lib/security2.lib.php b/htdocs/core/lib/security2.lib.php
index 8c8bb3cbb10..c9f4ece6445 100644
--- a/htdocs/core/lib/security2.lib.php
+++ b/htdocs/core/lib/security2.lib.php
@@ -105,9 +105,9 @@ function checkLoginPassEntity($usertotest,$passwordtotest,$entitytotest,$authmod
     			{
     				dol_syslog("Authentification ko - failed to load file '".$authfile."'", LOG_ERR);
     				sleep(1);
-    				$langs->load('main');
-    				$langs->load('other');
-    				$langs->load('errors');
+    				// Load translation files required by the page
+                    $langs->loadLangs(array('other', 'main', 'errors'));
+
     				$_SESSION["dol_loginmesg"]=$langs->trans("ErrorFailedToLoadLoginFileForMode", $mode);
     			}
     		}
diff --git a/htdocs/core/login/functions_dolibarr.php b/htdocs/core/login/functions_dolibarr.php
index 25d5f2dc30c..25cc45c2b6c 100644
--- a/htdocs/core/login/functions_dolibarr.php
+++ b/htdocs/core/login/functions_dolibarr.php
@@ -111,8 +111,10 @@ function check_user_password_dolibarr($usertotest,$passwordtotest,$entitytotest=
 				{
 					dol_syslog("functions_dolibarr::check_user_password_dolibarr Authentification ko bad password for '".$usertotest."'");
 					sleep(2);      // Anti brut force protection
-					$langs->load('main');
-					$langs->load('errors');
+
+					// Load translation files required by the page
+                    $langs->loadLangs(array('main', 'errors'));
+
 					$_SESSION["dol_loginmesg"]=$langs->trans("ErrorBadLoginPassword");
 				}
 
@@ -137,8 +139,10 @@ function check_user_password_dolibarr($usertotest,$passwordtotest,$entitytotest=
 			{
 				dol_syslog("functions_dolibarr::check_user_password_dolibarr Authentification ko user not found for '".$usertotest."'");
 				sleep(1);
-				$langs->load('main');
-				$langs->load('errors');
+
+				// Load translation files required by the page
+                $langs->loadLangs(array('main', 'errors'));
+
 				$_SESSION["dol_loginmesg"]=$langs->trans("ErrorBadLoginPassword");
 			}
 		}
diff --git a/htdocs/core/login/functions_ldap.php b/htdocs/core/login/functions_ldap.php
index d468c882b2d..6e13d55171c 100644
--- a/htdocs/core/login/functions_ldap.php
+++ b/htdocs/core/login/functions_ldap.php
@@ -54,8 +54,10 @@ function check_user_password_ldap($usertotest,$passwordtotest,$entitytotest)
 	{
 		dol_syslog("functions_ldap::check_user_password_ldap Authentification ko failed to connect to LDAP. LDAP functions are disabled on this PHP");
 		sleep(1);
-		$langs->load('main');
-		$langs->load('other');
+
+		// Load translation files required by the page
+        $langs->loadLangs(array('main', 'other'));
+
 		$_SESSION["dol_loginmesg"]=$langs->trans("ErrorLDAPFunctionsAreDisabledOnThisPHP").' '.$langs->trans("TryAnotherConnectionMode");
 		return;
 	}
@@ -207,8 +209,10 @@ function check_user_password_ldap($usertotest,$passwordtotest,$entitytotest)
 			{
 				dol_syslog("functions_ldap::check_user_password_ldap Authentification ko bad user/password for '".$usertotest."'");
 				sleep(1);
-				$langs->load('main');
-				$langs->load('other');
+
+				// Load translation files required by the page
+                $langs->loadLangs(array('main', 'other'));
+
 				$_SESSION["dol_loginmesg"]=$langs->trans("ErrorBadLoginPassword");
 			}
 		}
@@ -230,9 +234,10 @@ function check_user_password_ldap($usertotest,$passwordtotest,$entitytotest)
 				dol_syslog("functions_ldap::check_user_password_ldap ".$ldap->ldapErrorCode." ".$ldap->ldapErrorText);
 			}
 			sleep(2);      // Anti brut force protection
-			$langs->load('main');
-			$langs->load('other');
-			$langs->load('errors');
+
+			// Load translation files required by the page
+            $langs->loadLangs(array('main', 'other', 'errors'));
+;
 			$_SESSION["dol_loginmesg"]=($ldap->error?$ldap->error:$langs->trans("ErrorBadLoginPassword"));
 		}
 
diff --git a/htdocs/core/menus/standard/eldy.lib.php b/htdocs/core/menus/standard/eldy.lib.php
index 12a7a24fe48..b81b1c0faf7 100644
--- a/htdocs/core/menus/standard/eldy.lib.php
+++ b/htdocs/core/menus/standard/eldy.lib.php
@@ -565,8 +565,8 @@ function print_left_eldy_menu($db,$menu_array_before,$menu_array_after,&$tabMenu
 			$newmenu->add("/admin/tools/index.php?mainmenu=home&amp;leftmenu=admintools", $langs->trans("AdminTools"), 0, $user->admin, '', $mainmenu, 'admintools', 0, '', '', '', '<i class="fa fa-server fa-fw paddingright"></i>');
 			if ($usemenuhider || empty($leftmenu) || preg_match('/^admintools/',$leftmenu))
 			{
-				$langs->load("admin");
-				$langs->load("help");
+			    // Load translation files required by the page
+                $langs->loadLangs(array('admin', 'help'));
 
 				$newmenu->add('/admin/system/dolibarr.php?mainmenu=home&amp;leftmenu=admintools_info', $langs->trans('InfoDolibarr'), 1);
 				if ($usemenuhider || empty($leftmenu) || $leftmenu=='admintools_info') $newmenu->add('/admin/system/modules.php?mainmenu=home&amp;leftmenu=admintools_info', $langs->trans('Modules'), 2);
diff --git a/htdocs/core/modules/contract/doc/doc_generic_contract_odt.modules.php b/htdocs/core/modules/contract/doc/doc_generic_contract_odt.modules.php
index a57b8c88aec..1d79e851780 100644
--- a/htdocs/core/modules/contract/doc/doc_generic_contract_odt.modules.php
+++ b/htdocs/core/modules/contract/doc/doc_generic_contract_odt.modules.php
@@ -37,10 +37,10 @@ require_once DOL_DOCUMENT_ROOT.'/core/lib/doc.lib.php';
  */
 class doc_generic_contract_odt extends ModelePDFContract
 {
-	var $emetteur;	// Objet societe qui emet
+	public $emetteur;	// Objet societe qui emet
 
-	var $phpmin = array(5,2,0);	// Minimum version of PHP required by module
-	var $version = 'dolibarr';
+	public $phpmin = array(5,4,0);	// Minimum version of PHP required by module
+	public $version = 'dolibarr';
 
 
 	/**
@@ -97,8 +97,8 @@ class doc_generic_contract_odt extends ModelePDFContract
 	{
 		global $conf,$langs;
 
-		$langs->load("companies");
-		$langs->load("errors");
+		// Load translation files required by the page
+        $langs->loadLangs(array('companies', 'errors'));
 
 		$form = new Form($this->db);
 
diff --git a/htdocs/core/modules/facture/doc/doc_generic_invoice_odt.modules.php b/htdocs/core/modules/facture/doc/doc_generic_invoice_odt.modules.php
index a73d6f13296..75c84a58ba0 100644
--- a/htdocs/core/modules/facture/doc/doc_generic_invoice_odt.modules.php
+++ b/htdocs/core/modules/facture/doc/doc_generic_invoice_odt.modules.php
@@ -38,10 +38,10 @@ require_once DOL_DOCUMENT_ROOT.'/core/lib/doc.lib.php';
  */
 class doc_generic_invoice_odt extends ModelePDFFactures
 {
-	var $emetteur;	// Objet societe qui emet
+	public $emetteur;	// Objet societe qui emet
 
-	var $phpmin = array(5,2,0);	// Minimum version of PHP required by module
-	var $version = 'dolibarr';
+	public $phpmin = array(5,4,0);	// Minimum version of PHP required by module
+	public $version = 'dolibarr';
 
 
 	/**
@@ -53,8 +53,8 @@ class doc_generic_invoice_odt extends ModelePDFFactures
 	{
 		global $conf,$langs,$mysoc;
 
-		$langs->load("main");
-		$langs->load("companies");
+		// Load translation files required by the page
+        $langs->loadLangs(array("main","companies"));
 
 		$this->db = $db;
 		$this->name = "ODT/ODS templates";
diff --git a/htdocs/core/modules/mailings/fraise.modules.php b/htdocs/core/modules/mailings/fraise.modules.php
index 35116b1a902..9cf0f56f7e2 100644
--- a/htdocs/core/modules/mailings/fraise.modules.php
+++ b/htdocs/core/modules/mailings/fraise.modules.php
@@ -237,8 +237,9 @@ class mailing_fraise extends MailingTargets
 	    }
 
     	global $langs,$_POST;
-		$langs->load("members");
-        $langs->load("companies");
+
+    	// Load translation files required by the page
+        $langs->loadLangs(array("members","companies"));
 
         $cibles = array();
         $now=dol_now();
diff --git a/htdocs/core/modules/stock/doc/doc_generic_stock_odt.modules.php b/htdocs/core/modules/stock/doc/doc_generic_stock_odt.modules.php
index b57b957e8a4..aaa231ffc54 100644
--- a/htdocs/core/modules/stock/doc/doc_generic_stock_odt.modules.php
+++ b/htdocs/core/modules/stock/doc/doc_generic_stock_odt.modules.php
@@ -96,8 +96,8 @@ class doc_generic_stock_odt extends ModelePDFStock
 	{
 		global $conf,$langs;
 
-		$langs->load("companies");
-		$langs->load("errors");
+		// Load translation files required by the page
+        $langs->loadLangs(array("errors","companies"));
 
 		$form = new Form($this->db);
 
diff --git a/htdocs/core/modules/supplier_order/mod_commande_fournisseur_orchidee.php b/htdocs/core/modules/supplier_order/mod_commande_fournisseur_orchidee.php
index 4639a94279c..fb800d1d63d 100644
--- a/htdocs/core/modules/supplier_order/mod_commande_fournisseur_orchidee.php
+++ b/htdocs/core/modules/supplier_order/mod_commande_fournisseur_orchidee.php
@@ -46,8 +46,8 @@ class mod_commande_fournisseur_orchidee extends ModeleNumRefSuppliersOrders
     {
     	global $conf,$langs;
 
-		$langs->load("bills");
-		$langs->load("admin");
+		// Load translation files required by the page
+        $langs->loadLangs(array("bills","admin"));
 
 		$form = new Form($this->db);
 
diff --git a/htdocs/core/modules/supplier_proposal/doc/doc_generic_supplier_proposal_odt.modules.php b/htdocs/core/modules/supplier_proposal/doc/doc_generic_supplier_proposal_odt.modules.php
index da3eb6ef734..a7c2db68a26 100644
--- a/htdocs/core/modules/supplier_proposal/doc/doc_generic_supplier_proposal_odt.modules.php
+++ b/htdocs/core/modules/supplier_proposal/doc/doc_generic_supplier_proposal_odt.modules.php
@@ -37,10 +37,10 @@ require_once DOL_DOCUMENT_ROOT.'/core/lib/doc.lib.php';
  */
 class doc_generic_supplier_proposal_odt extends ModelePDFSupplierProposal
 {
-	var $emetteur;	// Objet societe qui emet
+	public $emetteur;	// Objet societe qui emet
 
-	var $phpmin = array(5,2,0);	// Minimum version of PHP required by module
-	var $version = 'dolibarr';
+	public $phpmin = array(5,4,0);	// Minimum version of PHP required by module
+	public $version = 'dolibarr';
 
 
 	/**
@@ -52,8 +52,8 @@ class doc_generic_supplier_proposal_odt extends ModelePDFSupplierProposal
 	{
 		global $conf,$langs,$mysoc;
 
-		$langs->load("main");
-		$langs->load("companies");
+		// Load translation files required by the page
+        $langs->loadLangs(array("main","companies"));
 
 		$this->db = $db;
 		$this->name = "ODT templates";
diff --git a/htdocs/core/modules/ticket/mod_ticket_universal.php b/htdocs/core/modules/ticket/mod_ticket_universal.php
index 3371a071c8a..c3dad0aa482 100644
--- a/htdocs/core/modules/ticket/mod_ticket_universal.php
+++ b/htdocs/core/modules/ticket/mod_ticket_universal.php
@@ -43,8 +43,8 @@ class mod_ticket_universal extends ModeleNumRefTicket
     {
         global $conf, $langs;
 
-        $langs->load("ticket");
-        $langs->load("admin");
+        // Load translation files required by the page
+        $langs->loadLangs(array("ticket","admin"));
 
         $form = new Form($this->db);