diff --git a/htdocs/webservices/server_invoice.php b/htdocs/webservices/server_invoice.php
index 7572238264f..9e67019dacc 100755
--- a/htdocs/webservices/server_invoice.php
+++ b/htdocs/webservices/server_invoice.php
@@ -34,6 +34,8 @@ require_once(DOL_DOCUMENT_ROOT."/compta/facture/class/facture.class.php");
 
 dol_syslog("Call Dolibarr webservices interfaces");
 
+$langs->load("main");
+
 // Enable and test if module web services is enabled
 if (empty($conf->global->MAIN_MODULE_WEBSERVICES))
 {
diff --git a/htdocs/webservices/server_other.php b/htdocs/webservices/server_other.php
index 26aac4bce5a..e3f0402bbf1 100644
--- a/htdocs/webservices/server_other.php
+++ b/htdocs/webservices/server_other.php
@@ -33,6 +33,8 @@ require_once(DOL_DOCUMENT_ROOT."/core/lib/functions2.lib.php");
 
 dol_syslog("Call Dolibarr webservices interfaces");
 
+$langs->load("main");
+
 // Enable and test if module web services is enabled
 if (empty($conf->global->MAIN_MODULE_WEBSERVICES))
 {
diff --git a/htdocs/webservices/server_productorservice.php b/htdocs/webservices/server_productorservice.php
index bd71a98b92a..d7d062126d0 100755
--- a/htdocs/webservices/server_productorservice.php
+++ b/htdocs/webservices/server_productorservice.php
@@ -33,6 +33,8 @@ require_once(DOL_DOCUMENT_ROOT."/product/class/product.class.php");
 
 dol_syslog("Call Dolibarr webservices interfaces");
 
+$langs->load("main");
+
 // Enable and test if module web services is enabled
 if (empty($conf->global->MAIN_MODULE_WEBSERVICES))
 {
diff --git a/htdocs/webservices/server_supplier_invoice.php b/htdocs/webservices/server_supplier_invoice.php
index 03a85daf3e8..304c5bfd598 100755
--- a/htdocs/webservices/server_supplier_invoice.php
+++ b/htdocs/webservices/server_supplier_invoice.php
@@ -33,6 +33,8 @@ require_once(DOL_DOCUMENT_ROOT."/fourn/class/fournisseur.facture.class.php");
 
 dol_syslog("Call Dolibarr webservices interfaces");
 
+$langs->load("main");
+
 // Enable and test if module web services is enabled
 if (empty($conf->global->MAIN_MODULE_WEBSERVICES))
 {
diff --git a/htdocs/webservices/server_thirdparty.php b/htdocs/webservices/server_thirdparty.php
index e7f4a76d269..d140a7ef31b 100755
--- a/htdocs/webservices/server_thirdparty.php
+++ b/htdocs/webservices/server_thirdparty.php
@@ -33,6 +33,8 @@ require_once(DOL_DOCUMENT_ROOT."/societe/class/societe.class.php");
 
 dol_syslog("Call Dolibarr webservices interfaces");
 
+$langs->load("main");
+
 // Enable and test if module web services is enabled
 if (empty($conf->global->MAIN_MODULE_WEBSERVICES))
 {
diff --git a/htdocs/webservices/server_user.php b/htdocs/webservices/server_user.php
index 1178f1f007d..8a43026b983 100644
--- a/htdocs/webservices/server_user.php
+++ b/htdocs/webservices/server_user.php
@@ -32,6 +32,8 @@ require_once(DOL_DOCUMENT_ROOT."/user/class/user.class.php");
 
 dol_syslog("Call User webservices interfaces");
 
+$langs->load("main");
+
 // Enable and test if module web services is enabled
 if (empty($conf->global->MAIN_MODULE_WEBSERVICES))
 {