diff --git a/src/backend/catalog/dependency.c b/src/backend/catalog/dependency.c
index ef16e6ba133..aa2d198776d 100644
--- a/src/backend/catalog/dependency.c
+++ b/src/backend/catalog/dependency.c
@@ -991,14 +991,14 @@ reportDependentObjects(const ObjectAddresses *targetObjects,
 					(errcode(ERRCODE_DEPENDENT_OBJECTS_STILL_EXIST),
 					 errmsg("cannot drop %s because other objects depend on it",
 							getObjectDescription(origObject)),
-					 errdetail("%s", clientdetail.data),
+					 errdetail_internal("%s", clientdetail.data),
 					 errdetail_log("%s", logdetail.data),
 					 errhint("Use DROP ... CASCADE to drop the dependent objects too.")));
 		else
 			ereport(ERROR,
 					(errcode(ERRCODE_DEPENDENT_OBJECTS_STILL_EXIST),
 					 errmsg("cannot drop desired object(s) because other objects depend on them"),
-					 errdetail("%s", clientdetail.data),
+					 errdetail_internal("%s", clientdetail.data),
 					 errdetail_log("%s", logdetail.data),
 					 errhint("Use DROP ... CASCADE to drop the dependent objects too.")));
 	}
@@ -1010,7 +1010,7 @@ reportDependentObjects(const ObjectAddresses *targetObjects,
 							   "drop cascades to %d other objects",
 							   numReportedClient + numNotReportedClient,
 							   numReportedClient + numNotReportedClient),
-				 errdetail("%s", clientdetail.data),
+				 errdetail_internal("%s", clientdetail.data),
 				 errdetail_log("%s", logdetail.data)));
 	}
 	else if (numReportedClient == 1)
diff --git a/src/backend/commands/user.c b/src/backend/commands/user.c
index f1c2b0ff134..6f24fdb3c27 100644
--- a/src/backend/commands/user.c
+++ b/src/backend/commands/user.c
@@ -552,7 +552,7 @@ AlterRole(AlterRoleStmt *stmt)
 	Oid			roleid;
 
 	check_rolespec_name(stmt->role,
-						"Cannot alter reserved roles.");
+						_("Cannot alter reserved roles."));
 
 	/* Extract options from the statement node tree */
 	foreach(option, stmt->options)
@@ -906,7 +906,7 @@ AlterRoleSet(AlterRoleSetStmt *stmt)
 	if (stmt->role)
 	{
 		check_rolespec_name(stmt->role,
-							"Cannot alter reserved roles.");
+							_("Cannot alter reserved roles."));
 
 		roletuple = get_rolespec_tuple(stmt->role);
 		roleid = HeapTupleGetOid(roletuple);
diff --git a/src/backend/utils/adt/acl.c b/src/backend/utils/adt/acl.c
index d4df743523f..eeff2ca089d 100644
--- a/src/backend/utils/adt/acl.c
+++ b/src/backend/utils/adt/acl.c
@@ -5307,7 +5307,7 @@ get_rolespec_name(const RoleSpec *role)
 
 /*
  * Given a RoleSpec, throw an error if the name is reserved, using detail_msg,
- * if provided.
+ * if provided (which must be already translated).
  *
  * If node is NULL, no error is thrown.  If detail_msg is NULL then no detail
  * message is provided.
@@ -5328,7 +5328,7 @@ check_rolespec_name(const RoleSpec *role, const char *detail_msg)
 					(errcode(ERRCODE_RESERVED_NAME),
 					 errmsg("role name \"%s\" is reserved",
 							role->rolename),
-					 errdetail("%s", detail_msg)));
+					 errdetail_internal("%s", detail_msg)));
 		else
 			ereport(ERROR,
 					(errcode(ERRCODE_RESERVED_NAME),