From d2f364bbd78837e225382f6c229e2a6bfcf19f74 Mon Sep 17 00:00:00 2001
From: Sebastian Wick <sebastian.wick@redhat.com>
Date: Mon, 29 Jun 2026 22:14:50 +0200
Subject: [PATCH] locale-utils: Ensure the flatpak lang only contains a-zA-Z

This should be the case anyway right now and makes it easier to ensure
the code using it is correct.
---
 common/flatpak-locale-utils.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/common/flatpak-locale-utils.c b/common/flatpak-locale-utils.c
index 2908e0fb7..f45541f60 100644
--- a/common/flatpak-locale-utils.c
+++ b/common/flatpak-locale-utils.c
@@ -64,6 +64,12 @@ flatpak_get_lang_from_locale (const char *locale)
   if (strcmp (lang, "C") == 0)
     return NULL;
 
+  for (c = lang; *c != 0; c++)
+    {
+      if (!g_ascii_isalpha (*c))
+        return NULL;
+    }
+
   return g_steal_pointer (&lang);
 }