diff --git a/pylib/anki/lang.py b/pylib/anki/lang.py
index 285a5c5fc..629029017 100644
--- a/pylib/anki/lang.py
+++ b/pylib/anki/lang.py
@@ -121,7 +121,6 @@ def lang_to_disk_lang(lang: str) -> str:
     # these language/region combinations are fully qualified, but with a hyphen
     if lang in (
         "en_GB",
-        "es_ES",
         "ga_IE",
         "hy_AM",
         "nb_NO",