diff --git a/.changeset/gold-bats-scream.md b/.changeset/gold-bats-scream.md
new file mode 100644
index 000000000000..b4888f53b98f
--- /dev/null
+++ b/.changeset/gold-bats-scream.md
@@ -0,0 +1,5 @@
+---
+"astro": 5.1.9
+---
+
+fix(i18n): improve locale path checking and normalization