diff --git a/core/modules/content_translation/config/schema/content_translation.schema.yml b/core/modules/content_translation/config/schema/content_translation.schema.yml
new file mode 100644
index 0000000..747cfa0
--- /dev/null
+++ b/core/modules/content_translation/config/schema/content_translation.schema.yml
@@ -0,0 +1,19 @@
+# Schema for the configuration files of the Content Translation module.
+
+content_translation.settings.*.*:
+  type: mapping
+  label: 'Content language'
+  mapping:
+    content_translation:
+      type: mapping
+      label: 'Content translation settings'
+      mapping:
+        enabled:
+          type: boolean
+          label: 'Translatable'
+        fields:
+          type: sequence
+          label: 'Fields'
+          sequence:
+            - type: boolean
+              label: 'Enabled'
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'