Use dummy translator when no translator is configured

library/Zend/Mvc/I18n/DummyTranslator.php

@@ -0,0 +1,29 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link      http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2013 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace Zend\Mvc\I18n;
+
+use Zend\Validator\Translator\TranslatorInterface as ValidatorTranslatorInterface;
+
+class DummyTranslator implements ValidatorTranslatorInterface
+{
+    /**
+     * translate(): defined by ValidatorTranslatorInterface()
+     *
+     * @see    ValidatorTranslatorInterface::translate()
+     * @param  string $message
+     * @param  string $textDomain
+     * @param  string $locale
+     * @return string
+     */
+    public function translate($message, $textDomain = 'default', $locale = null)
+    {
+        return $message;
+    }
+}

library/Zend/Mvc/Service/TranslatorServiceFactory.php

@@ -10,6 +10,7 @@
 namespace Zend\Mvc\Service;
 
 use Zend\I18n\Translator\TranslatorServiceFactory as I18nTranslatorServiceFactory;
+use Zend\Mvc\I18n\DummyTranslator;
 use Zend\Mvc\I18n\Translator;
 use Zend\ServiceManager\ServiceLocatorInterface;
 
@@ -22,7 +23,12 @@ class TranslatorServiceFactory extends I18nTranslatorServiceFactory
     public function createService(ServiceLocatorInterface $serviceLocator)
     {
         // Configure the translator
-        $config     = $serviceLocator->get('Config');
+        $config = $serviceLocator->get('Config');
+
+        if (!isset($config['translator']) || !class_exists('Zend\I18n\Translator')) {
+            return new DummyTranslator();
+        }
+
         $trConfig   = isset($config['translator']) ? $config['translator'] : array();
         $translator = Translator::factory($trConfig);
         return $translator;