diff --git a/src/Plugin/Field/FieldWidget/InlineEntityFormComplex.php b/src/Plugin/Field/FieldWidget/InlineEntityFormComplex.php
index b8424be..e7e2aaf 100644
--- a/src/Plugin/Field/FieldWidget/InlineEntityFormComplex.php
+++ b/src/Plugin/Field/FieldWidget/InlineEntityFormComplex.php
@@ -935,4 +935,17 @@ class InlineEntityFormComplex extends InlineEntityFormBase implements ContainerF
     inline_entity_form_close_all_forms($element, $form_state);
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function form(FieldItemListInterface $items, array &$form, FormStateInterface $form_state, $get_delta = NULL) {
+    $elements = parent::form($items, $form, $form_state, $get_delta);
+
+    // Signal to content_translation that this field should be treated as
+    // multilingual and not be hidden, see
+    // \Drupal\content_translation\ContentTranslationHandler::entityFormSharedElements().
+    $elements['#multilingual'] = TRUE;
+    return $elements;
+  }
+
 }
diff --git a/src/Plugin/Field/FieldWidget/InlineEntityFormSimple.php b/src/Plugin/Field/FieldWidget/InlineEntityFormSimple.php
index 985e06b..0ddf8d7 100644
--- a/src/Plugin/Field/FieldWidget/InlineEntityFormSimple.php
+++ b/src/Plugin/Field/FieldWidget/InlineEntityFormSimple.php
@@ -212,4 +212,17 @@ class InlineEntityFormSimple extends InlineEntityFormBase {
     }
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function form(FieldItemListInterface $items, array &$form, FormStateInterface $form_state, $get_delta = NULL) {
+    $elements = parent::form($items, $form, $form_state, $get_delta);
+
+    // Signal to content_translation that this field should be treated as
+    // multilingual and not be hidden, see
+    // \Drupal\content_translation\ContentTranslationHandler::entityFormSharedElements().
+    $elements['#multilingual'] = TRUE;
+    return $elements;
+  }
+
 }