diff --git a/build.py b/build.py
index 65705dd..d2fa9cf 100644
--- a/build.py
+++ b/build.py
@@ -2,8 +2,8 @@ import yaml
 import os
 
 LANG_LABELS = {
-    "en": "English",
-    "de": "Deutsch",
+    "en": "english",
+    "de": "deutsch",
 }
 
 with open("content.yaml", "r") as f: