1 files changed, 10 insertions, 0 deletions
diff --git a/talermerchantdemos/blog/blog.py b/talermerchantdemos/blog/blog.py
index 90ef3b9..263c7cf 100644
--- a/talermerchantdemos/blog/blog.py
+++ b/talermerchantdemos/blog/blog.py
@@ -164,6 +164,16 @@ def favicon():
 # @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="Language {} not found".format(lang),
+        )
+
     if lang in ARTICLES:
         translated = ARTICLES[lang]
     else: