diff --git a/core/modules/book/config/node.type.book.yml b/core/modules/book/config/node.type.book.yml
index 426778d..2b39fd1 100644
--- a/core/modules/book/config/node.type.book.yml
+++ b/core/modules/book/config/node.type.book.yml
@@ -16,4 +16,4 @@ settings:
       revision: '0'
     submitted: '1'
 status: '1'
-langcode: und
+langcode: en
diff --git a/core/modules/forum/config/node.type.forum.yml b/core/modules/forum/config/node.type.forum.yml
index 7ffb0e7..71dce86 100644
--- a/core/modules/forum/config/node.type.forum.yml
+++ b/core/modules/forum/config/node.type.forum.yml
@@ -16,4 +16,4 @@ settings:
       revision: '0'
     submitted: '1'
 status: '1'
-langcode: und
+langcode: en
diff --git a/core/modules/node/tests/modules/node_test_config/config/node.type.default.yml b/core/modules/node/tests/modules/node_test_config/config/node.type.default.yml
index 1e17673..a93a9c6 100644
--- a/core/modules/node/tests/modules/node_test_config/config/node.type.default.yml
+++ b/core/modules/node/tests/modules/node_test_config/config/node.type.default.yml
@@ -15,4 +15,4 @@ settings:
       revision: '0'
     submitted: '1'
 status: '1'
-langcode: und
+langcode: en
diff --git a/core/modules/node/tests/modules/node_test_config/staging/node.type.import.yml b/core/modules/node/tests/modules/node_test_config/staging/node.type.import.yml
index f2a4f4a..e5ce0ba 100644
--- a/core/modules/node/tests/modules/node_test_config/staging/node.type.import.yml
+++ b/core/modules/node/tests/modules/node_test_config/staging/node.type.import.yml
@@ -15,4 +15,4 @@ settings:
       revision: '0'
     submitted: '1'
 status: '1'
-langcode: und
+langcode: en
diff --git a/core/profiles/standard/config/node.type.article.yml b/core/profiles/standard/config/node.type.article.yml
index 4bb97a4..dd2394f 100644
--- a/core/profiles/standard/config/node.type.article.yml
+++ b/core/profiles/standard/config/node.type.article.yml
@@ -15,4 +15,4 @@ settings:
       revision: '0'
     submitted: '1'
 status: '1'
-langcode: und
+langcode: en
diff --git a/core/profiles/standard/config/node.type.page.yml b/core/profiles/standard/config/node.type.page.yml
index 987f75c..48a919a 100644
--- a/core/profiles/standard/config/node.type.page.yml
+++ b/core/profiles/standard/config/node.type.page.yml
@@ -15,4 +15,4 @@ settings:
       revision: '0'
     submitted: '0'
 status: '1'
-langcode: und
+langcode: en