diff --git a/doc/source/conf.py b/doc/source/conf.py
index 488f172fa1d1e..7f7ddd8209272 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -164,7 +164,7 @@
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
-# language = None
+language = "en"
 
 # There are two options for replacing |today|: either, you set today to some
 # non-false value, then it is used: