diff --git a/bt5/erp5_hal_json_style/SkinTemplateItem/portal_skins/erp5_hal_json_style/ERP5Document_getHateoas.py b/bt5/erp5_hal_json_style/SkinTemplateItem/portal_skins/erp5_hal_json_style/ERP5Document_getHateoas.py
index 7228dd7b6c662ae96ab6e744b84633813e087d2c..bdd162217bf85e863de2bcf842e61afe2294f4a7 100644
--- a/bt5/erp5_hal_json_style/SkinTemplateItem/portal_skins/erp5_hal_json_style/ERP5Document_getHateoas.py
+++ b/bt5/erp5_hal_json_style/SkinTemplateItem/portal_skins/erp5_hal_json_style/ERP5Document_getHateoas.py
@@ -1042,7 +1042,7 @@ def renderForm(traversed_document, form, response_dict, key_prefix=None, selecti
       try:
         response_dict[field.id] = renderField(traversed_document, field, form, key_prefix=key_prefix, selection_params=selection_params, request_field=not use_relation_form_page_template)
         if field_errors.has_key(field.id):
-          response_dict[field.id]["error_text"] = field_errors[field.id].error_text
+          response_dict[field.id]["error_text"] = field_errors[field.id].getMessage(Base_translateString)
       except AttributeError as error:
         # Do not crash if field configuration is wrong.
         log("Field {} rendering failed because of {!s}".format(field.id, error), level=800)
diff --git a/product/ERP5/bootstrap/erp5_xhtml_style/SkinTemplateItem/portal_skins/erp5_xhtml_style/field_render.zpt b/product/ERP5/bootstrap/erp5_xhtml_style/SkinTemplateItem/portal_skins/erp5_xhtml_style/field_render.zpt
index c76e64683b7d2579b7617bbd4d77aa66087d5493..5e8789c3ff97fae2b504cb9efd1cd11fb696b012 100644
--- a/product/ERP5/bootstrap/erp5_xhtml_style/SkinTemplateItem/portal_skins/erp5_xhtml_style/field_render.zpt
+++ b/product/ERP5/bootstrap/erp5_xhtml_style/SkinTemplateItem/portal_skins/erp5_xhtml_style/field_render.zpt
@@ -30,8 +30,7 @@
           <div class="input" tal:content="structure python: html_tuple[1]" />
           <span tal:condition="field_has_error"
                 class="error"
-                tal:content="python: field_errors[field_id].error_text"
-                i18n:translate="" i18n:domain="ui" />
+                tal:content="python: field_errors[field_id].getMessage(here.Base_translateString)" />
           <p class="clear" tal:condition="not:is_web_mode"></p>
         </tal:block>
       </div>
diff --git a/product/Formulator/Errors.py b/product/Formulator/Errors.py
index e2276ef4da61b9d29db20bcc23d7329d508cfd74..8d86d7d59c2fd043beb12a7876aba39d5e237cfe 100644
--- a/product/Formulator/Errors.py
+++ b/product/Formulator/Errors.py
@@ -5,6 +5,7 @@
 # from Products.Formulator.Errors import ValidationError, FormValidationError
 
 from Products.PythonScripts.Utility import allow_class
+from AccessControl import ClassSecurityInfo
 
 class FormValidationError(Exception):
 
@@ -17,6 +18,8 @@ allow_class(FormValidationError)
 
 class ValidationError(Exception):
 
+    security = ClassSecurityInfo()
+
     def __init__(self, error_key, field, error_text=None):
         Exception.__init__(self, error_key)
         self.error_key = error_key
@@ -24,8 +27,18 @@ class ValidationError(Exception):
         self.field = field
         if error_text is not None:
           self.error_text = error_text
+          self.is_message_to_translate = False
         else:
           self.error_text = field.get_error_message(error_key)
+          self.is_message_to_translate = True
+
+    security.declarePublic('getMessage')
+    def getMessage(self, translation_service=None):
+      if not self.is_message_to_translate:
+        return self.error_text
+      if translation_service is None:
+        return self.error_text
+      return translation_service(self.error_text)
 
 allow_class(ValidationError)