From 42e0c1dbe9e70d92083116f86f98e0557639f2a8 Mon Sep 17 00:00:00 2001
From: Thomas Kaul <4159106+dtslvr@users.noreply.github.com>
Date: Sat, 17 Oct 2026 14:28:05 +0200
Subject: [PATCH] Bugfix/type check of unsupported language codes in Stripe
 checkout session (#8189)

Fix type check
---
 apps/api/src/app/subscription/subscription.service.ts | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/apps/api/src/app/subscription/subscription.service.ts b/apps/api/src/app/subscription/subscription.service.ts
index b46d385432..867df56c91 100644
--- a/apps/api/src/app/subscription/subscription.service.ts
+++ b/apps/api/src/app/subscription/subscription.service.ts
@@ -268,7 +268,12 @@ export class SubscriptionService {
     const unsupportedLanguageCodes: Record<
       Exclude<
         (typeof SUPPORTED_LANGUAGE_CODES)[number],
-        Stripe.Checkout.SessionCreateParams.Locale
+        // Extract keeps only the Stripe locales that Ghostfolio supports.
+        // This also removes OtherString, which matches every string.
+        Extract<
+          Stripe.Checkout.SessionCreateParams.Locale,
+          (typeof SUPPORTED_LANGUAGE_CODES)[number]
+        >
       >,
       true
     > = {