diff --git a/app/controllers/google/callbacks_controller.rb b/app/controllers/google/callbacks_controller.rb
index fd785cb84..047d7c7d5 100644
--- a/app/controllers/google/callbacks_controller.rb
+++ b/app/controllers/google/callbacks_controller.rb
@@ -39,7 +39,7 @@ class Google::CallbacksController < OauthCallbackController
     ChatwootExceptionTracker.new(exception).capture_exception
 
     error_code = exception.respond_to?(:code) ? exception.code : 'OAUTH_ERR'
-    error_message = exception.message || 'OAuth authorization failed'
+    error_message = exception.message || I18n.t('errors.oauth.authorization_failed', provider: 'Google')
 
     redirect_url = "#{ENV.fetch('FRONTEND_URL', 'http://localhost:3000')}/app/accounts/#{account.id}/settings/inboxes/new/email"
     redirect_to "#{redirect_url}?error=#{CGI.escape(error_message)}&code=#{error_code}"
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 53fc3f29c..672470dc5 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -51,8 +51,6 @@ en:
     oauth:
       insufficient_scopes: 'Insufficient permissions granted. Missing scopes: %{scopes}'
       authorization_failed: 'Authorization failed for %{provider}'
-      token_exchange_failed: 'Failed to exchange authorization code for %{provider}'
-      invalid_state: 'Invalid or missing state parameter'
     data_import:
       data_type:
         invalid: Invalid data type
diff --git a/lib/custom_exceptions/oauth.rb b/lib/custom_exceptions/oauth.rb
index ba73635d9..0bffa8531 100644
--- a/lib/custom_exceptions/oauth.rb
+++ b/lib/custom_exceptions/oauth.rb
@@ -18,57 +18,4 @@ module CustomExceptions::OAuth
       }
     end
   end
-
-  class AuthorizationFailed < CustomExceptions::Base
-    def message
-      I18n.t('errors.oauth.authorization_failed', provider: @data[:provider])
-    end
-
-    def code
-      'AUTH_ERR'
-    end
-
-    def to_hash
-      {
-        message: message,
-        code: code,
-        provider: @data[:provider]
-      }
-    end
-  end
-
-  class TokenExchangeFailed < CustomExceptions::Base
-    def message
-      I18n.t('errors.oauth.token_exchange_failed', provider: @data[:provider])
-    end
-
-    def code
-      'TOKEN_ERR'
-    end
-
-    def to_hash
-      {
-        message: message,
-        code: code,
-        provider: @data[:provider]
-      }
-    end
-  end
-
-  class InvalidState < CustomExceptions::Base
-    def message
-      I18n.t('errors.oauth.invalid_state')
-    end
-
-    def code
-      'STATE_ERR'
-    end
-
-    def to_hash
-      {
-        message: message,
-        code: code
-      }
-    end
-  end
 end
\ No newline at end of file