1 files changed, 10 insertions, 0 deletions
diff --git a/talermerchantdemos/donations/donations.py b/talermerchantdemos/donations/donations.py
index b522508..ea7138b 100644
--- a/talermerchantdemos/donations/donations.py
+++ b/talermerchantdemos/donations/donations.py
@@ -175,6 +175,16 @@ def index():
 # @return response object of the index page.
 @app.route("/<lang>/")
 def start(lang):
+
+    # get_locale defaults to english, hence the
+    # condition below happens only when lang is
+    # wrong or unsupported, respond 404.
+    if lang != get_locale():
+        err_abort(
+            404,
+            message=f"Language {lang} not found",
+        )
+
     return flask.render_template(
         "donations-index.html.j2", 
         page_title=gettext("GNU Taler Demo: Donations"),