diff --git a/core/modules/language/config/install/language.negotiation.yml b/core/modules/language/config/install/language.negotiation.yml
index e4e8e22..dde0bea 100644
--- a/core/modules/language/config/install/language.negotiation.yml
+++ b/core/modules/language/config/install/language.negotiation.yml
@@ -6,3 +6,4 @@ url:
     en: ''
   domains:
     en: ''
+selected_langcode: site_default