diff --git a/contrib/jsonb_plpython/Makefile b/contrib/jsonb_plpython/Makefile
index e3f160510d..fea7bdfc00 100644
--- a/contrib/jsonb_plpython/Makefile
+++ b/contrib/jsonb_plpython/Makefile
@@ -4,7 +4,7 @@ MODULE_big = jsonb_plpython$(python_majorversion)
 OBJS = \
 	$(WIN32RES) \
 	jsonb_plpython.o
-PGFILEDESC = "jsonb_plpython - transform between jsonb and plpython3u"
+PGFILEDESC = "jsonb_plpython - jsonb transform for plpython"
 
 PG_CPPFLAGS = -I$(top_srcdir)/src/pl/plpython $(python_includespec) -DPLPYTHON_LIBNAME='"plpython$(python_majorversion)"'
 
diff --git a/doc/src/sgml/json.sgml b/doc/src/sgml/json.sgml
index b3b16b8a77..c4223fafb6 100644
--- a/doc/src/sgml/json.sgml
+++ b/doc/src/sgml/json.sgml
@@ -716,7 +716,7 @@ UPDATE table_name SET jsonb_field[1]['a'] = '1';
   </para>
 
   <para>
-   The extensions for PL/Python is called <literal>jsonb_plpython3u</literal>.
+   The extension for PL/Python is called <literal>jsonb_plpython3u</literal>.
    If you use it, <type>jsonb</type> values are mapped to Python
    dictionaries, lists, and scalars, as appropriate.
   </para>
diff --git a/doc/src/sgml/ltree.sgml b/doc/src/sgml/ltree.sgml
index 4ff384c7ee..508f404ae8 100644
--- a/doc/src/sgml/ltree.sgml
+++ b/doc/src/sgml/ltree.sgml
@@ -826,15 +826,15 @@ ltreetest=&gt; SELECT ins_label(path,2,'Space') FROM test WHERE path &lt;@ 'Top.
   <title>Transforms</title>
 
   <para>
-   The <literal>ltree_plpython3u</literal> implement transforms for the
-   <type>ltree</type> type for PL/Python. If installed and specified when
+   The <literal>ltree_plpython3u</literal> extension implements transforms for
+   the <type>ltree</type> type for PL/Python. If installed and specified when
    creating a function, <type>ltree</type> values are mapped to Python lists.
    (The reverse is currently not supported, however.)
   </para>
 
   <caution>
    <para>
-    It is strongly recommended that the transform extensions be installed in
+    It is strongly recommended that the transform extension be installed in
     the same schema as <filename>ltree</filename>.  Otherwise there are
     installation-time security hazards if a transform extension's schema
     contains objects defined by a hostile user.
diff --git a/doc/src/sgml/plpython.sgml b/doc/src/sgml/plpython.sgml
index fab4330cd1..7698d5f068 100644
--- a/doc/src/sgml/plpython.sgml
+++ b/doc/src/sgml/plpython.sgml
@@ -52,7 +52,7 @@
   <para>
    PL/Python supports only Python 3. Past versions of
    <productname>PostgreSQL</productname> supported Python 2, using the
-   <literal>plpyhonu</literal> and <literal>plpython2u</literal> language
+   <literal>plpythonu</literal> and <literal>plpython2u</literal> language
    names.
   </para>
  </sect1>