diff --git a/js/scripts.js b/js/scripts.js
index dd3715f91..8aa7b1b0c 100644
--- a/js/scripts.js
+++ b/js/scripts.js
@@ -1108,6 +1108,7 @@ var plugin_formcreator = new function() {
 
    this.newTranslation = function (formLanguageId) {
       glpi_ajax_dialog({
+         dialogclass: 'modal-xl',
          url: '../ajax/form_language.php',
          params: {
             action: 'newTranslation',