diff -u b/core/modules/field/field.module b/core/modules/field/field.module
--- b/core/modules/field/field.module
+++ b/core/modules/field/field.module
@@ -427,0 +428,9 @@
+
+/**
+ * Implements hook_modules_uninstalled().
+ */
+function field_modules_uninstalled($modules) {
+  /** @var \Drupal\field\EntityDisplayRebuilder $display_rebuilder */
+  $display_rebuilder = \Drupal::service('field.entity_display_rebuilder');
+  $display_rebuilder->rebuildAllEntityTypeDisplays(TRUE);
+}
diff -u b/core/modules/field/src/EntityDisplayRebuilder.php b/core/modules/field/src/EntityDisplayRebuilder.php
--- b/core/modules/field/src/EntityDisplayRebuilder.php
+++ b/core/modules/field/src/EntityDisplayRebuilder.php
@@ -49,6 +49,22 @@
   }
 
   /**
+   * Rebuild displays for all Entity Types.
+   *
+   * @param bool $include_default_displays
+   *   Add 'default' displays. Defaults to FALSE.
+   *
+   * @throws \Drupal\Core\Entity\EntityStorageException
+   *   In case of failures an exception is thrown.
+   */
+  public function rebuildAllEntityTypeDisplays($include_default_displays = FALSE) {
+    $entity_types = $this->entityTypeManager->getDefinitions();
+    foreach ($entity_types as $entity_type_id => $entity_type_definition) {
+      $this->rebuildEntityTypeDisplays($entity_type_id, $include_default_displays);
+    }
+  }
+
+  /**
    * Rebuild displays for single Entity Type.
    *
    * @param string $entity_type_id
diff -u b/core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php b/core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php
--- b/core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php
+++ b/core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php
@@ -117,2 +117,32 @@
 
+  /**
+   * Ensure display modes are updated after uninstalling Language module.
+   */
+  public function testDisplayModeConfigAfterUninstall() {
+    $default_view_display = 'core.entity_view_display.entity_test.entity_test.default';
+    $default_form_display = 'core.entity_form_display.entity_test.entity_test.default';
+    $foobar_view_display = 'core.entity_view_display.entity_test.entity_test.foobar';
+    $foobar_form_display = 'core.entity_form_display.entity_test.entity_test.foobar';
+
+    // Install language module.
+    \Drupal::service('module_installer')->install(['language']);
+
+    // 1. Validate that "langcode" key is there.
+    $this->assertArrayHasKey('langcode', \Drupal::config($default_view_display)->get('hidden'));
+    $this->assertArrayHasKey('langcode', \Drupal::config($default_form_display)->get('content'));
+    $this->assertArrayHasKey('langcode', \Drupal::config($foobar_view_display)->get('hidden'));
+    $this->assertArrayHasKey('langcode', \Drupal::config($foobar_form_display)->get('content'));
+
+    // 2. Uninstall language module.
+    $this->installSchema('user', ['users_data']);
+    \Drupal::service('module_installer')->uninstall(['language']);
+
+    // 3. Test that "langcode" key is removed from field config.
+    $this->assertArrayNotHasKey('langcode', \Drupal::config($default_view_display)->get('hidden'));
+    $this->assertArrayNotHasKey('langcode', \Drupal::config($default_form_display)->get('content'));
+    $this->assertArrayNotHasKey('langcode', \Drupal::config($foobar_view_display)->get('hidden'));
+    $this->assertArrayNotHasKey('langcode', \Drupal::config($foobar_form_display)->get('content'));
+
+  }
+
 }