diff --git a/iam/api/models.py b/iam/api/models.py
index 6846b39f..8ddea4e9 100644
--- a/iam/api/models.py
+++ b/iam/api/models.py
@@ -180,7 +180,7 @@
                                         'check': "iterate-list",
                                         'check-list': [
                                             {
-                                                'check': 'dict-keys-exact',
+                                                'check': 'dict-keys-exist',
                                                 'keys': ['event_id', 'title']
                                             },
                                             {
@@ -210,6 +210,25 @@
                                                         'range': [1, 254]
                                                     }
                                                 ]
+                                            },
+                                            {
+                                                'check': 'index-check-list',
+                                                'index': 'title_i18n',
+                                                'optional': True,
+                                                'check-list': [
+                                                    {
+                                                        'check': 'isinstance',
+                                                        'type': dict
+                                                    },
+                                                    {   # keys are strings
+                                                        'check': 'lambda',
+                                                        'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+                                                    },
+                                                    {   # values are strings
+                                                        'check': 'lambda',
+                                                        'lambda': lambda d: all([isinstance(k, str) for k in d.values()])
+                                                    },
+                                                ]
                                             }
                                         ]
                                     }
diff --git a/iam/authmethods/m_dnie.py b/iam/authmethods/m_dnie.py
index 5a8d679b..c2f6f095 100644
--- a/iam/authmethods/m_dnie.py
+++ b/iam/authmethods/m_dnie.py
@@ -14,17 +14,26 @@
 # along with iam.  If not, see <http://www.gnu.org/licenses/>.
 
 import json
+import logging
 from . import register_method
 from django.shortcuts import get_object_or_404, redirect
 from django.conf.urls import url
 from django.http import Http404
 
-from authmethods.utils import check_pipeline, give_perms
+from authmethods.utils import (
+    check_pipeline,
+    give_perms,
+    stack_trace_str
+)
 
 from api.models import AuthEvent
 
 from utils import json_response
 
+from contracts.base import check_contract, JsonTypeEncoder
+from contracts import CheckException
+
+LOGGER = logging.getLogger('iam')
 
 def testview(request):
     req = request.GET
@@ -112,6 +121,70 @@ class DNIE:
     )
     dni_definition = { "name": "dni", "type": "text", "required": True, "min": 2, "max": 200, "required_on_authentication": True }
 
+    CONFIG_CONTRACT = [
+      {
+        'check': 'isinstance',
+        'type': dict
+      },
+      {
+          'check': 'index-check-list',
+          'index': 'msg_i18n',
+          'optional': True,
+          'check-list': [
+              {
+                  'check': 'isinstance',
+                  'type': dict
+              },
+              {   # keys are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+              },
+              {   # values are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 200 for k in d.values()])
+              },
+          ]
+      },
+      {
+          'check': 'index-check-list',
+          'index': 'subject_i18n',
+          'optional': True,
+          'check-list': [
+              {
+                  'check': 'isinstance',
+                  'type': dict
+              },
+              {   # keys are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+              },
+              {   # values are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 1024 for k in d.values()])
+              },
+          ]
+      },
+      {
+        'check': 'index-check-list',
+        'index': 'html_message_i18n',
+        'optional': True,
+        'check-list': [
+            {
+                'check': 'isinstance',
+                'type': dict
+            },
+            {   # keys are strings
+                'check': 'lambda',
+                'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+            },
+            {   # values are strings
+                'check': 'lambda',
+                'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 5000 for k in d.values()])
+            },
+        ]
+      }
+    ]
+
     def error(
             self, msg, auth_event=None, error_codename=None, internal_error=None
         ):
@@ -135,7 +208,26 @@ def authenticate(self, ae, request):
         return d
 
     def check_config(self, config):
-        return ''
+        """ Check config when create auth-event. """
+        if config is None:
+            return ''
+        try:
+            check_contract(self.CONFIG_CONTRACT, config)
+            LOGGER.debug(\
+                "Dnie.check_config success\n"\
+                "config '%r'\n"\
+                "returns ''\n"\
+                "Stack trace: \n%s",\
+                config, stack_trace_str())
+            return ''
+        except CheckException as e:
+            LOGGER.error(\
+                "Dnie.check_config error\n"\
+                "error '%r'\n"\
+                "config '%r'\n"\
+                "Stack trace: \n%s",\
+                e.data, config, stack_trace_str())
+            return json.dumps(e.data, cls=JsonTypeEncoder)
 
     def census(self, ae, request):
         req = json.loads(request.body.decode('utf-8'))
diff --git a/iam/authmethods/m_email.py b/iam/authmethods/m_email.py
index ac389901..f1df7ec1 100644
--- a/iam/authmethods/m_email.py
+++ b/iam/authmethods/m_email.py
@@ -129,6 +129,63 @@ class Email:
         'check': 'dict-keys-exist',
         'keys': ['msg', 'subject', 'registration-action', 'authentication-action']
       },
+      {
+          'check': 'index-check-list',
+          'index': 'msg_i18n',
+          'optional': True,
+          'check-list': [
+              {
+                  'check': 'isinstance',
+                  'type': dict
+              },
+              {   # keys are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+              },
+              {   # values are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 200 for k in d.values()])
+              },
+          ]
+      },
+      {
+          'check': 'index-check-list',
+          'index': 'subject_i18n',
+          'optional': True,
+          'check-list': [
+              {
+                  'check': 'isinstance',
+                  'type': dict
+              },
+              {   # keys are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+              },
+              {   # values are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 1024 for k in d.values()])
+              },
+          ]
+      },
+      {
+        'check': 'index-check-list',
+        'index': 'html_message_i18n',
+        'optional': True,
+        'check-list': [
+            {
+                'check': 'isinstance',
+                'type': dict
+            },
+            {   # keys are strings
+                'check': 'lambda',
+                'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+            },
+            {   # values are strings
+                'check': 'lambda',
+                'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 5000 for k in d.values()])
+            },
+        ]
+      },
       {
         'check': 'index-check-list',
         'index': 'msg',
diff --git a/iam/authmethods/m_email_otp.py b/iam/authmethods/m_email_otp.py
index 8c3e4770..bd17348d 100644
--- a/iam/authmethods/m_email_otp.py
+++ b/iam/authmethods/m_email_otp.py
@@ -133,6 +133,44 @@ class EmailOtp:
         'check': 'dict-keys-exist',
         'keys': ['msg', 'subject', 'registration-action', 'authentication-action']
       },
+      {
+          'check': 'index-check-list',
+          'index': 'msg_i18n',
+          'optional': True,
+          'check-list': [
+              {
+                  'check': 'isinstance',
+                  'type': dict
+              },
+              {   # keys are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+              },
+              {   # values are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 200 for k in d.values()])
+              },
+          ]
+      },
+      {
+          'check': 'index-check-list',
+          'index': 'subject_i18n',
+          'optional': True,
+          'check-list': [
+              {
+                  'check': 'isinstance',
+                  'type': dict
+              },
+              {   # keys are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+              },
+              {   # values are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 1024 for k in d.values()])
+              },
+          ]
+      },
       {
         'check': 'index-check-list',
         'index': 'msg',
@@ -162,6 +200,25 @@ class EmailOtp:
           }
         ]
       },
+      {
+        'check': 'index-check-list',
+        'index': 'html_message_i18n',
+        'optional': True,
+        'check-list': [
+            {
+                'check': 'isinstance',
+                'type': dict
+            },
+            {   # keys are strings
+                'check': 'lambda',
+                'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+            },
+            {   # values are strings
+                'check': 'lambda',
+                'lambda': lambda d: all([isinstance(k, str)  and len(k) > 0 and len(k) <= 5000 for k in d.values()])
+            },
+        ]
+      },
       {
         'check': 'index-check-list',
         'index': 'subject',
diff --git a/iam/authmethods/m_emailpwd.py b/iam/authmethods/m_emailpwd.py
index c658acdc..8eeabc27 100644
--- a/iam/authmethods/m_emailpwd.py
+++ b/iam/authmethods/m_emailpwd.py
@@ -44,6 +44,9 @@
     authenticate_otl
 )
 
+from contracts.base import check_contract, JsonTypeEncoder
+from contracts import CheckException
+
 LOGGER = logging.getLogger('iam')
 
 
@@ -85,8 +88,91 @@ class EmailPassword:
         "required_on_authentication": True
     }
 
+    CONFIG_CONTRACT = [
+        {
+        'check': 'isinstance',
+        'type': dict
+        },
+        {
+            'check': 'index-check-list',
+            'index': 'msg_i18n',
+            'optional': True,
+            'check-list': [
+                {
+                    'check': 'isinstance',
+                    'type': dict
+                },
+                {   # keys are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+                },
+                {   # values are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 200 for k in d.values()])
+                },
+            ]
+        },
+        {
+            'check': 'index-check-list',
+            'index': 'subject_i18n',
+            'optional': True,
+            'check-list': [
+                {
+                    'check': 'isinstance',
+                    'type': dict
+                },
+                {   # keys are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+                },
+                {   # values are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 1024 for k in d.values()])
+                },
+            ]
+        },
+        {
+            'check': 'index-check-list',
+            'index': 'html_message_i18n',
+            'optional': True,
+            'check-list': [
+                {
+                    'check': 'isinstance',
+                    'type': dict
+                },
+                {   # keys are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+                },
+                {   # values are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str)  and len(k) > 0 and len(k) <= 5000 for k in d.values()])
+                },
+            ]
+        }
+    ]
+
     def check_config(self, config):
-        return ''
+        """ Check config when create auth-event. """
+        if config is None:
+            return ''
+        try:
+            check_contract(self.CONFIG_CONTRACT, config)
+            LOGGER.debug(\
+                "EmailPwd.check_config success\n"\
+                "config '%r'\n"\
+                "returns ''\n"\
+                "Stack trace: \n%s",\
+                config, stack_trace_str())
+            return ''
+        except CheckException as e:
+            LOGGER.error(\
+                "EmailPwd.check_config error\n"\
+                "error '%r'\n"\
+                "config '%r'\n"\
+                "Stack trace: \n%s",\
+                e.data, config, stack_trace_str())
+            return json.dumps(e.data, cls=JsonTypeEncoder)
 
     def census(self, auth_event, request):
         req = json.loads(request.body.decode('utf-8'))
diff --git a/iam/authmethods/m_openidconnect.py b/iam/authmethods/m_openidconnect.py
index 0206c57d..0d7ef2f0 100644
--- a/iam/authmethods/m_openidconnect.py
+++ b/iam/authmethods/m_openidconnect.py
@@ -50,6 +50,9 @@
 from oic.utils.authn.client import CLIENT_AUTHN_METHOD
 from oic.utils.time_util import utc_time_sans_frac
 
+from contracts.base import check_contract, JsonTypeEncoder
+from contracts import CheckException
+
 LOGGER = logging.getLogger('iam')
 
 
@@ -90,6 +93,70 @@ class OpenIdConnect(object):
         "required_on_authentication": True
     }
 
+    CONFIG_CONTRACT = [
+        {
+        'check': 'isinstance',
+        'type': dict
+        },
+        {
+            'check': 'index-check-list',
+            'index': 'msg_i18n',
+            'optional': True,
+            'check-list': [
+                {
+                    'check': 'isinstance',
+                    'type': dict
+                },
+                {   # keys are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+                },
+                {   # values are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 200 for k in d.values()])
+                },
+            ]
+        },
+        {
+            'check': 'index-check-list',
+            'index': 'subject_i18n',
+            'optional': True,
+            'check-list': [
+                {
+                    'check': 'isinstance',
+                    'type': dict
+                },
+                {   # keys are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+                },
+                {   # values are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 1024 for k in d.values()])
+                },
+            ]
+        },
+        {
+            'check': 'index-check-list',
+            'index': 'html_message_i18n',
+            'optional': True,
+            'check-list': [
+                {
+                    'check': 'isinstance',
+                    'type': dict
+                },
+                {   # keys are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+                },
+                {   # values are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str)  and len(k) > 0 and len(k) <= 5000 for k in d.values()])
+                },
+            ]
+        }
+    ]
+
     PROVIDERS = dict()
 
     def __init__(self):
@@ -122,7 +189,26 @@ def __init__(self):
             )
 
     def check_config(self, config):
-        return ''
+        """ Check config when create auth-event. """
+        if config is None:
+            return ''
+        try:
+            check_contract(self.CONFIG_CONTRACT, config)
+            LOGGER.debug(\
+                "OpenId.check_config success\n"\
+                "config '%r'\n"\
+                "returns ''\n"\
+                "Stack trace: \n%s",\
+                config, stack_trace_str())
+            return ''
+        except CheckException as e:
+            LOGGER.error(\
+                "OpenId.check_config error\n"\
+                "error '%r'\n"\
+                "config '%r'\n"\
+                "Stack trace: \n%s",\
+                e.data, config, stack_trace_str())
+            return json.dumps(e.data, cls=JsonTypeEncoder)
 
     def census(self, ae, request):
         return {'status': 'ok'}
diff --git a/iam/authmethods/m_pwd.py b/iam/authmethods/m_pwd.py
index 9fc64bf6..4abd04c6 100644
--- a/iam/authmethods/m_pwd.py
+++ b/iam/authmethods/m_pwd.py
@@ -45,6 +45,9 @@
     authenticate_otl
 )
 
+from contracts.base import check_contract, JsonTypeEncoder
+from contracts import CheckException
+
 LOGGER = logging.getLogger('iam')
 
 
@@ -86,8 +89,92 @@ class Password:
         "required_on_authentication": True
     }
 
+    CONFIG_CONTRACT = [
+        {
+        'check': 'isinstance',
+        'type': dict
+        },
+        {
+            'check': 'index-check-list',
+            'index': 'msg_i18n',
+            'optional': True,
+            'check-list': [
+                {
+                    'check': 'isinstance',
+                    'type': dict
+                },
+                {   # keys are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+                },
+                {   # values are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 200 for k in d.values()])
+                },
+            ]
+        },
+        {
+            'check': 'index-check-list',
+            'index': 'subject_i18n',
+            'optional': True,
+            'check-list': [
+                {
+                    'check': 'isinstance',
+                    'type': dict
+                },
+                {   # keys are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+                },
+                {   # values are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 1024 for k in d.values()])
+                },
+            ]
+        },
+        {
+            'check': 'index-check-list',
+            'index': 'html_message_i18n',
+            'optional': True,
+            'check-list': [
+                {
+                    'check': 'isinstance',
+                    'type': dict
+                },
+                {   # keys are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+                },
+                {   # values are strings
+                    'check': 'lambda',
+                    'lambda': lambda d: all([isinstance(k, str)  and len(k) > 0 and len(k) <= 5000 for k in d.values()])
+                },
+            ]
+        }
+    ]
+
     def check_config(self, config):
-        return ''
+        """ Check config when create auth-event. """
+        if config is None:
+            return ''
+        try:
+            check_contract(self.CONFIG_CONTRACT, config)
+            LOGGER.debug(\
+                "OpenId.check_config success\n"\
+                "config '%r'\n"\
+                "returns ''\n"\
+                "Stack trace: \n%s",\
+                config, stack_trace_str())
+            return ''
+        except CheckException as e:
+            LOGGER.error(\
+                "OpenId.check_config error\n"\
+                "error '%r'\n"\
+                "config '%r'\n"\
+                "Stack trace: \n%s",\
+                e.data, config, stack_trace_str())
+            return json.dumps(e.data, cls=JsonTypeEncoder)
+
 
     def census(self, auth_event, request):
         req = json.loads(request.body.decode('utf-8'))
diff --git a/iam/authmethods/m_smart_link.py b/iam/authmethods/m_smart_link.py
index 66abc054..45870dff 100644
--- a/iam/authmethods/m_smart_link.py
+++ b/iam/authmethods/m_smart_link.py
@@ -90,6 +90,63 @@ class SmartLink:
       'check': 'isinstance',
       'type': dict
     },
+    {
+        'check': 'index-check-list',
+        'index': 'msg_i18n',
+        'optional': True,
+        'check-list': [
+            {
+                'check': 'isinstance',
+                'type': dict
+            },
+            {   # keys are strings
+                'check': 'lambda',
+                'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+            },
+            {   # values are strings
+                'check': 'lambda',
+                'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 200 for k in d.values()])
+            },
+        ]
+    },
+    {
+        'check': 'index-check-list',
+        'index': 'subject_i18n',
+        'optional': True,
+        'check-list': [
+            {
+                'check': 'isinstance',
+                'type': dict
+            },
+            {   # keys are strings
+                'check': 'lambda',
+                'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+            },
+            {   # values are strings
+                'check': 'lambda',
+                'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 1024 for k in d.values()])
+            },
+        ]
+    },
+    {
+        'check': 'index-check-list',
+        'index': 'html_message_i18n',
+        'optional': True,
+        'check-list': [
+            {
+                'check': 'isinstance',
+                'type': dict
+            },
+            {   # keys are strings
+                'check': 'lambda',
+                'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+            },
+            {   # values are strings
+                'check': 'lambda',
+                'lambda': lambda d: all([isinstance(k, str)  and len(k) > 0 and len(k) <= 5000 for k in d.values()])
+            },
+        ]
+    },
     {
       'check': 'lambda',
       'lambda': lambda data: (
diff --git a/iam/authmethods/m_sms.py b/iam/authmethods/m_sms.py
index ce86dd52..2fc56ed7 100644
--- a/iam/authmethods/m_sms.py
+++ b/iam/authmethods/m_sms.py
@@ -140,6 +140,25 @@ class Sms:
         'check': 'dict-keys-exist',
         'keys': ['msg', 'registration-action', 'authentication-action']
       },
+      {
+          'check': 'index-check-list',
+          'index': 'msg_i18n',
+          'optional': True,
+          'check-list': [
+              {
+                  'check': 'isinstance',
+                  'type': dict
+              },
+              {   # keys are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+              },
+              {   # values are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 200 for k in d.values()])
+              },
+          ]
+      },
       {
         'check': 'index-check-list',
         'index': 'msg',
@@ -169,6 +188,25 @@ class Sms:
           }
         ]
       },
+      {
+          'check': 'index-check-list',
+          'index': 'html_message_i18n',
+          'optional': True,
+          'check-list': [
+              {
+                  'check': 'isinstance',
+                  'type': dict
+              },
+              {   # keys are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+              },
+              {   # values are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 5000 for k in d.values()])
+              },
+          ]
+      },
       {
         'check': 'index-check-list',
         'index': 'registration-action',
diff --git a/iam/authmethods/m_sms_otp.py b/iam/authmethods/m_sms_otp.py
index ab88d5a7..3097f54f 100644
--- a/iam/authmethods/m_sms_otp.py
+++ b/iam/authmethods/m_sms_otp.py
@@ -141,6 +141,25 @@ class SmsOtp:
         'check': 'dict-keys-exist',
         'keys': ['msg', 'registration-action', 'authentication-action']
       },
+      {
+          'check': 'index-check-list',
+          'index': 'msg_i18n',
+          'optional': True,
+          'check-list': [
+              {
+                  'check': 'isinstance',
+                  'type': dict
+              },
+              {   # keys are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+              },
+              {   # values are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 200 for k in d.values()])
+              },
+          ]
+      },
       {
         'check': 'index-check-list',
         'index': 'msg',
@@ -170,6 +189,25 @@ class SmsOtp:
           }
         ]
       },
+      {
+          'check': 'index-check-list',
+          'index': 'html_message_i18n',
+          'optional': True,
+          'check-list': [
+              {
+                  'check': 'isinstance',
+                  'type': dict
+              },
+              {   # keys are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) for k in d.keys()])
+              },
+              {   # values are strings
+                  'check': 'lambda',
+                  'lambda': lambda d: all([isinstance(k, str) and len(k) > 0 and len(k) <= 5000 for k in d.values()])
+              },
+          ]
+      },
       {
         'check': 'index-check-list',
         'index': 'registration-action',
diff --git a/iam/utils.py b/iam/utils.py
index 45660d97..95df0d0a 100644
--- a/iam/utils.py
+++ b/iam/utils.py
@@ -1062,7 +1062,9 @@ def send_codes(
 # CHECKERS AUTHEVENT
 VALID_FIELDS = (
   'name',
+  'name_i18n',
   'help',
+  'help_i18n',
   'type',
   'required',
   'autofill',
@@ -1241,6 +1243,19 @@ def check_pipeline(pipe):
                 msg += "Invalid pipeline functions: %s not possible.\n" % func
     return msg
 
+def check_translation_field(key, value, prefix):
+    msg = ''
+    if not isinstance(value, dict):
+        msg += "%s bad %s.\n" % (prefix, key)
+    else:
+        for k, v in value:
+            if not isinstance(k, str) or not isinstance(v, str) or \
+                len(k) > settings.MAX_SIZE_NAME_EXTRA_FIELD or len(k) < 1 or \
+                len(v) > settings.MAX_SIZE_NAME_EXTRA_FIELD or len(v) < 1:
+                msg += "%s bad %s.\n" % (prefix, key)
+                break
+    return msg
+
 def check_extra_field(key, value):
     """ Check fields in extra_fields when create auth-event. """
     from sys import maxsize
@@ -1248,6 +1263,8 @@ def check_extra_field(key, value):
     if key == 'name' or key == 'help':
         if len(value) > settings.MAX_SIZE_NAME_EXTRA_FIELD or len(value) < 1:
             msg += "Invalid extra_fields: bad %s.\n" % key
+    elif key == 'name_i18n' or key == 'help_i18n':
+        msg += check_translation_field(key, value, "Invalid extra_fields:")
     elif key == 'type':
         if not value in VALID_TYPE_FIELDS:
             msg += "Invalid extra_fields: bad %s.\n" % key