Fix plural typo in documentation (GH-19799)

Co-authored-by: Alex Povel <python@alexpovel.de>
diff --git a/Doc/faq/design.rst b/Doc/faq/design.rst
index df3dbf4..4e3cc57 100644
--- a/Doc/faq/design.rst
+++ b/Doc/faq/design.rst
@@ -651,7 +651,7 @@
 ---------------------------------------------------------------------
 
 Python has a 'with' statement that wraps the execution of a block, calling code
-on the entrance and exit from the block.  Some language have a construct that
+on the entrance and exit from the block.  Some languages have a construct that
 looks like this::
 
    with obj: