diff --git a/core/modules/config_translation/migrations/d7_system_site_translation.yml b/core/modules/config_translation/migrations/d7_system_site_translation.yml
new file mode 100644
index 0000000000000000000000000000000000000000..9aac86df53aec5ed9827ad29e7b309eb141e038c
--- /dev/null
+++ b/core/modules/config_translation/migrations/d7_system_site_translation.yml
@@ -0,0 +1,27 @@
+id: d7_system_site_translation
+label: Site configuration translation
+migration_tags:
+  - Drupal 7
+  - Configuration
+  - Multilingual
+source:
+  plugin: d7_variable_translation
+  variables:
+    - site_name
+    - site_mail
+    - site_slogan
+    - site_frontpage
+    - site_403
+    - site_404
+process:
+  langcode: language
+  name: site_name
+  mail: site_mail
+  slogan: site_slogan
+  'page/front': site_frontpage
+  'page/403': site_403
+  'page/404': site_404
+destination:
+  plugin: config
+  config_name: system.site
+  translations: true
diff --git a/core/modules/config_translation/tests/src/Kernel/Migrate/d7/MigrateSystemSiteTranslationTest.php b/core/modules/config_translation/tests/src/Kernel/Migrate/d7/MigrateSystemSiteTranslationTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..e25a0f8fb9375664403d66eb582ffeb40c2efede
--- /dev/null
+++ b/core/modules/config_translation/tests/src/Kernel/Migrate/d7/MigrateSystemSiteTranslationTest.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace Drupal\Tests\config_translation\Kernel\Migrate\d7;
+
+use Drupal\Tests\migrate_drupal\Kernel\d7\MigrateDrupal7TestBase;
+
+/**
+ * Migrate multilingual site variables.
+ *
+ * @group migrate_drupal_7
+ */
+class MigrateSystemSiteTranslationTest extends MigrateDrupal7TestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = [
+    'language',
+    'config_translation',
+    // Required for translation migrations.
+    'migrate_drupal_multilingual',
+  ];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+    $this->executeMigration('d7_system_site_translation');
+  }
+
+  /**
+   * Tests migration of system (site) variables to system.site.yml.
+   */
+  public function testSystemSite() {
+    $language_manager = \Drupal::service('language_manager');
+    $config_translation = $language_manager->getLanguageConfigOverride('fr', 'system.site');
+    $this->assertSame('The Site Name', $config_translation->get('name'));
+    $this->assertSame('fr - The Slogan', $config_translation->get('slogan'));
+    $this->assertSame('node', $config_translation->get('page.403'));
+    $this->assertSame('node', $config_translation->get('page.404'));
+    $this->assertSame('node', $config_translation->get('page.front'));
+    $this->assertSame(NULL, $config_translation->get('admin_compact_mode'));
+
+    $config_translation = $language_manager->getLanguageConfigOverride('is', 'system.site');
+    $this->assertSame('is - The Site Name', $config_translation->get('name'));
+    $this->assertSame('is - The Slogan', $config_translation->get('slogan'));
+    $this->assertSame('node/1', $config_translation->get('page.403'));
+    $this->assertSame('node/6', $config_translation->get('page.404'));
+    $this->assertSame('node/4', $config_translation->get('page.front'));
+    $this->assertNULL($config_translation->get('admin_compact_mode'));
+  }
+
+}
diff --git a/core/modules/migrate_drupal/tests/fixtures/drupal7.php b/core/modules/migrate_drupal/tests/fixtures/drupal7.php
index 9e3e2042a4c7eceb6c93a46763b61246ec61cfb3..bf91e17c1588381dec989219d2a89f15e598ce86 100644
--- a/core/modules/migrate_drupal/tests/fixtures/drupal7.php
+++ b/core/modules/migrate_drupal/tests/fixtures/drupal7.php
@@ -51469,6 +51469,76 @@
   'value' => 'is - This is a custom maintenance mode message.',
   'serialized' => '0',
 ))
+->values(array(
+  'realm' => 'language',
+  'realm_key' => 'is',
+  'name' => 'site_403',
+  'value' => 'node/1',
+  'serialized' => '0',
+))
+->values(array(
+  'realm' => 'language',
+  'realm_key' => 'is',
+  'name' => 'site_404',
+  'value' => 'node/6',
+  'serialized' => '0',
+))
+->values(array(
+  'realm' => 'language',
+  'realm_key' => 'is',
+  'name' => 'site_frontpage',
+  'value' => 'node/4',
+  'serialized' => '0',
+))
+->values(array(
+  'realm' => 'language',
+  'realm_key' => 'is',
+  'name' => 'site_name',
+  'value' => 'is - The Site Name',
+  'serialized' => '0',
+))
+->values(array(
+  'realm' => 'language',
+  'realm_key' => 'is',
+  'name' => 'site_slogan',
+  'value' => 'is - The Slogan',
+  'serialized' => '0',
+))
+  ->values(array(
+  'realm' => 'language',
+  'realm_key' => 'fr',
+  'name' => 'site_403',
+  'value' => 'node',
+  'serialized' => '0',
+))
+->values(array(
+  'realm' => 'language',
+  'realm_key' => 'fr',
+  'name' => 'site_404',
+  'value' => 'node',
+  'serialized' => '0',
+))
+->values(array(
+  'realm' => 'language',
+  'realm_key' => 'fr',
+  'name' => 'site_frontpage',
+  'value' => 'node',
+  'serialized' => '0',
+))
+->values(array(
+  'realm' => 'language',
+  'realm_key' => 'fr',
+  'name' => 'site_name',
+  'value' => 'The Site Name',
+  'serialized' => '0',
+))
+->values(array(
+  'realm' => 'language',
+  'realm_key' => 'fr',
+  'name' => 'site_slogan',
+  'value' => 'fr - The Slogan',
+  'serialized' => '0',
+))
 ->execute();
 
 $connection->schema()->createTable('watchdog', array(