diff --git a/layouts/_default/headless-cms.html b/layouts/_default/headless-cms.html
index c89b44c..f55159c 100644
--- a/layouts/_default/headless-cms.html
+++ b/layouts/_default/headless-cms.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="{{ .Site.Language.LanguageCode }}">
+<html lang="{{ .Site.Language.Locale }}">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
@@ -42,7 +42,7 @@
     {{ else }}
     {{ errorf "Unable to .GetRemote %q" $url_sveltia }}
     {{ end }}
-    
+
     {{ else }}
     <h1>Error</h1>
     <p>
diff --git a/layouts/partials/headless-cms/functions/locale.html b/layouts/partials/headless-cms/functions/locale.html
index 58dda6c..0758642 100644
--- a/layouts/partials/headless-cms/functions/locale.html
+++ b/layouts/partials/headless-cms/functions/locale.html
@@ -5,7 +5,7 @@
   "zh-hk" "zh_Hant"
   "zh-tw" "zh_Hant"
 }}
-{{- $locale := site.Language.LanguageCode }}
+{{- $locale := site.Language.Locale }}
 {{- with index $locales $locale }}
   {{- $locale = . }}
 {{- end }}
