diff --git a/src/Symfony/Bundle/WebProfilerBundle/Resources/views/Collector/translation.html.twig b/src/Symfony/Bundle/WebProfilerBundle/Resources/views/Collector/translation.html.twig
index cd85ce3bade03..79c6e60ffbc10 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Resources/views/Collector/translation.html.twig
+++ b/src/Symfony/Bundle/WebProfilerBundle/Resources/views/Collector/translation.html.twig
@@ -13,7 +13,7 @@
 
         {% set text %}
             <div class="sf-toolbar-info-piece">
-                <b>Locale</b>
+                <b>Default locale</b>
                 <span class="sf-toolbar-status">
                     {{ collector.locale|default('-') }}
                 </span>
@@ -73,7 +73,7 @@
     <div class="metrics">
         <div class="metric">
             <span class="value">{{ collector.locale|default('-') }}</span>
-            <span class="label">Locale</span>
+            <span class="label">Default locale</span>
         </div>
         <div class="metric">
             <span class="value">{{ collector.fallbackLocales|join(', ')|default('-') }}</span>
@@ -152,7 +152,7 @@
                     </div>
                 {% else %}
                     {% block fallback_messages %}
-                        {{ helper.render_table(messages_fallback) }}
+                        {{ helper.render_table(messages_fallback, true) }}
                     {% endblock %}
                 {% endif %}
             </div>
@@ -185,11 +185,14 @@
 
 {% endblock %}
 
-{% macro render_table(messages) %}
+{% macro render_table(messages, is_fallback) %}
     <table>
         <thead>
             <tr>
                 <th>Locale</th>
+                {% if is_fallback %}
+                    <th>Fallback locale</th>
+                {% endif %}
                 <th>Domain</th>
                 <th>Times used</th>
                 <th>Message ID</th>
@@ -200,6 +203,9 @@
         {% for message in messages %}
             <tr>
                 <td class="font-normal text-small nowrap">{{ message.locale }}</td>
+                {% if is_fallback %}
+                    <td class="font-normal text-small nowrap">{{ message.fallbackLocale|default('-') }}</td>
+                {% endif %}
                 <td class="font-normal text-small text-bold nowrap">{{ message.domain }}</td>
                 <td class="font-normal text-small nowrap">{{ message.count }}</td>
                 <td>
diff --git a/src/Symfony/Component/Translation/DataCollectorTranslator.php b/src/Symfony/Component/Translation/DataCollectorTranslator.php
index 7eaf928e7ff93..e70e5f5e14e17 100644
--- a/src/Symfony/Component/Translation/DataCollectorTranslator.php
+++ b/src/Symfony/Component/Translation/DataCollectorTranslator.php
@@ -145,6 +145,7 @@ private function collectMessage($locale, $domain, $id, $translation, $parameters
         $id = (string) $id;
         $catalogue = $this->translator->getCatalogue($locale);
         $locale = $catalogue->getLocale();
+        $fallbackLocale = null;
         if ($catalogue->defines($id, $domain)) {
             $state = self::MESSAGE_DEFINED;
         } elseif ($catalogue->has($id, $domain)) {
@@ -153,10 +154,9 @@ private function collectMessage($locale, $domain, $id, $translation, $parameters
             $fallbackCatalogue = $catalogue->getFallbackCatalogue();
             while ($fallbackCatalogue) {
                 if ($fallbackCatalogue->defines($id, $domain)) {
-                    $locale = $fallbackCatalogue->getLocale();
+                    $fallbackLocale = $fallbackCatalogue->getLocale();
                     break;
                 }
-
                 $fallbackCatalogue = $fallbackCatalogue->getFallbackCatalogue();
             }
         } else {
@@ -165,6 +165,7 @@ private function collectMessage($locale, $domain, $id, $translation, $parameters
 
         $this->messages[] = [
             'locale' => $locale,
+            'fallbackLocale' => $fallbackLocale,
             'domain' => $domain,
             'id' => $id,
             'translation' => $translation,
diff --git a/src/Symfony/Component/Translation/Tests/DataCollectorTranslatorTest.php b/src/Symfony/Component/Translation/Tests/DataCollectorTranslatorTest.php
index 059d074648722..5cb7c31a40183 100644
--- a/src/Symfony/Component/Translation/Tests/DataCollectorTranslatorTest.php
+++ b/src/Symfony/Component/Translation/Tests/DataCollectorTranslatorTest.php
@@ -34,6 +34,7 @@ public function testCollectMessages()
             'id' => 'foo',
             'translation' => 'foo (en)',
             'locale' => 'en',
+            'fallbackLocale' => null,
             'domain' => 'messages',
             'state' => DataCollectorTranslator::MESSAGE_DEFINED,
             'parameters' => [],
@@ -42,7 +43,8 @@ public function testCollectMessages()
         $expectedMessages[] = [
             'id' => 'bar',
             'translation' => 'bar (fr)',
-            'locale' => 'fr',
+            'locale' => 'en',
+            'fallbackLocale' => 'fr',
             'domain' => 'messages',
             'state' => DataCollectorTranslator::MESSAGE_EQUALS_FALLBACK,
             'parameters' => [],
@@ -52,6 +54,7 @@ public function testCollectMessages()
             'id' => 'choice',
             'translation' => 'choice',
             'locale' => 'en',
+            'fallbackLocale' => null,
             'domain' => 'messages',
             'state' => DataCollectorTranslator::MESSAGE_MISSING,
             'parameters' => [],
@@ -60,7 +63,8 @@ public function testCollectMessages()
         $expectedMessages[] = [
             'id' => 'bar_ru',
             'translation' => 'bar (ru)',
-            'locale' => 'ru',
+            'locale' => 'en',
+            'fallbackLocale' => 'ru',
             'domain' => 'messages',
             'state' => DataCollectorTranslator::MESSAGE_EQUALS_FALLBACK,
             'parameters' => [],
@@ -69,7 +73,8 @@ public function testCollectMessages()
         $expectedMessages[] = [
             'id' => 'bar_ru',
             'translation' => 'bar (ru)',
-            'locale' => 'ru',
+            'locale' => 'en',
+            'fallbackLocale' => 'ru',
             'domain' => 'messages',
             'state' => DataCollectorTranslator::MESSAGE_EQUALS_FALLBACK,
             'parameters' => ['foo' => 'bar'],

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