diff --git a/core/modules/language/config/schema/language.schema.yml b/core/modules/language/config/schema/language.schema.yml
index 7b2ceb3..e48c9a2 100644
--- a/core/modules/language/config/schema/language.schema.yml
+++ b/core/modules/language/config/schema/language.schema.yml
@@ -106,3 +106,22 @@ language.entity.*:
     langcode:
       type: string
       label: 'Default language'
+
+language.settings.*.*:
+  type: mapping
+  label: 'Language settings'
+  mapping:
+    language:
+      type: mapping
+      label: 'Custom language settings'
+      mapping:
+        default_configuration:
+          type: mapping
+          label: 'Default language'
+          mapping:
+            langcode:
+              type: string
+              label: 'Default language'
+            language_show:
+              type: boolean
+              label: 'Show language selector on create and edit pages'