diff --git a/doc/source/conf.py b/doc/source/conf.py
index 3a4a58e..c8bf112 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -74,7 +74,7 @@ release = ''
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = None
+# language = None
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index 0cc971d..8088fea 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -83,7 +83,7 @@ release = ''
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = None
+# language = None
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.