diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 85184ce224a..18d98ffd8a0 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -4118,9 +4118,10 @@ function dol_print_error($db = '', $error = '', $errors = null)
 	if (empty($dolibarr_main_prod)) {
 		print $out;
 	} else {
+		if (empty($langs->defaultlang)) $langs->setDefaultLang();
+		$langs->loadLangs(array("main", "errors"));		// Reload main because language may have been set only on previous line so we have to reload files we need.
 		// This should not happen, except if there is a bug somewhere. Enabled and check log in such case.
 		print 'This website or feature is currently temporarly not available or failed after a technical error.<br><br>This may be due to a maintenance operation. Current status of operation are on next line...<br><br>'."\n";
-		$langs->loadLangs(array("main", "errors"));
 		print $langs->trans("DolibarrHasDetectedError").'. ';
 		print $langs->trans("YouCanSetOptionDolibarrMainProdToZero");
 		define("MAIN_CORE_ERROR", 1);