diff --git a/metadata.yaml b/metadata.yaml
index f865857b55ab124627b5c3c37e1d3ec9db8b8873..f8ddc05d79cddb765eeda46ecfd763bd6ea08c23 100644
--- a/metadata.yaml
+++ b/metadata.yaml
@@ -11,6 +11,7 @@ keywords:
   - three
 numbersections: yes
 lang: en
+babel-lang: english
 abstract: |
   This is the abstract.