WIP default language docs

Author: mnd999

modules/ROOT/pages/authentication-authorization/dbms-administration.adoc

@@ -884,6 +884,12 @@ GRANT [IMMUTABLE] SET DATABASE ACCESS
   TO role[, ...]
 | Enables the specified roles to modify access to standard databases.
 
+| [source, syntax, role=noheader]
+GRANT [IMMUTABLE] SET DATABASE DEFAULT LANGUAGE
+  ON DBMS
+  TO role[, ...]
+| Enables the specified roles to set the default query language on a database.
+
 | [source, syntax, role=noheader]
 GRANT CREATE COMPOSITE DATABASE
   ON DBMS