diff --git a/core/modules/config/src/Tests/ConfigImporterTest.php b/core/modules/config/src/Tests/ConfigImporterTest.php
index 581b5c4..a08d288 100644
--- a/core/modules/config/src/Tests/ConfigImporterTest.php
+++ b/core/modules/config/src/Tests/ConfigImporterTest.php
@@ -539,4 +539,24 @@ function testIsInstallable() {
     $this->assertTrue($this->container->get('config.storage')->exists($config_name));
   }
 
+  /**
+   * Tests imported configuration entities with and without language information.
+   */
+  function testLanguage() {
+    // Test imported configuration with implicit language code.
+    $data = $this->container->get('config.storage.installer')->read('config_test.dynamic.dotted.default');
+    $this->assertTrue(!isset($data['langcode']));
+    $this->assertEqual(
+      $this->config('config_test.dynamic.dotted.default')->get('langcode'),
+      'en'
+    );
+
+    // Test imported configuration with explicit language code.
+    $data = $this->container->get('config.storage.installer')->read('config_test.dynamic.dotted.french');
+    $this->assertEqual($data['langcode'], 'fr');
+    $this->assertEqual(
+      $this->config('config_test.dynamic.dotted.french')->get('langcode'),
+      'fr'
+    );
+  }
 }
diff --git a/core/modules/config/tests/config_test/config/install/config_test.dynamic.dotted.french.yml b/core/modules/config/tests/config_test/config/install/config_test.dynamic.dotted.french.yml
new file mode 100644
index 0000000..15927d2
--- /dev/null
+++ b/core/modules/config/tests/config_test/config/install/config_test.dynamic.dotted.french.yml
@@ -0,0 +1,5 @@
+id: dotted.french
+label: Default
+weight: 0
+protected_property: Default
+langcode: fr