diff -U3 /home/postgres/postgres/src/test/regress/expected/nls_1.out /home/postgres/postgres/build/testrun/pg_upgrade/002_pg_upgrade/data/results/nls.out
--- /home/postgres/postgres/src/test/regress/expected/nls_1.out	2025-12-09 02:13:39.938859320 +0000
+++ /home/postgres/postgres/build/testrun/pg_upgrade/002_pg_upgrade/data/results/nls.out	2025-12-09 02:15:29.652848365 +0000
@@ -12,8 +12,24 @@
   FROM pg_database WHERE datname = current_database()
 \gset
 SET lc_messages = :'es_locale';
+ERROR:  invalid value for parameter "lc_messages": "es_ES"
 SELECT test_translation();
-NOTICE:  NLS is not enabled
+NOTICE:  translated PRId64 = 424242424242
+NOTICE:  translated PRId32 = -1234
+NOTICE:  translated PRIdMAX = -5678
+NOTICE:  translated PRIdPTR = 9999
+NOTICE:  translated PRIu64 = 424242424242
+NOTICE:  translated PRIu32 = 1234
+NOTICE:  translated PRIuMAX = 5678
+NOTICE:  translated PRIuPTR = 9999
+NOTICE:  translated PRIx64 = 62c6d1a9b2
+NOTICE:  translated PRIx32 = 4d2
+NOTICE:  translated PRIxMAX = 162e
+NOTICE:  translated PRIxPTR = 270f
+NOTICE:  translated PRIX64 = 62C6D1A9B2
+NOTICE:  translated PRIX32 = 4D2
+NOTICE:  translated PRIXMAX = 162E
+NOTICE:  translated PRIXPTR = 270F
  test_translation 
 ------------------