diff --git a/apps/landing/src/middleware.ts b/apps/landing/src/middleware.ts
index 1ad265764..99a543cd3 100644
--- a/apps/landing/src/middleware.ts
+++ b/apps/landing/src/middleware.ts
@@ -19,7 +19,10 @@ export async function middleware(request: NextRequest) {
     return;
   }
 
-  const locale = getPreferredLocale(request);
+  const locale = getPreferredLocale({
+    acceptLanguageHeader: request.headers.get("accept-language") ?? undefined,
+  });
+
   request.nextUrl.pathname = `/${locale}${pathname}`;
 
   if (locale === "en") {
diff --git a/apps/web/src/middleware.ts b/apps/web/src/middleware.ts
index c90fefbe7..a9aab9965 100644
--- a/apps/web/src/middleware.ts
+++ b/apps/web/src/middleware.ts
@@ -19,7 +19,12 @@ export const middleware = withAuth(async (req) => {
     return NextResponse.redirect(newUrl);
   }
 
-  const locale = req.auth?.user?.locale || getPreferredLocale(req);
+  const locale =
+    req.auth?.user?.locale ||
+    getPreferredLocale({
+      acceptLanguageHeader: req.headers.get("accept-language") ?? undefined,
+    });
+
   if (supportedLocales.includes(locale)) {
     newUrl.pathname = `/${locale}${pathname}`;
   }
diff --git a/packages/billing/package.json b/packages/billing/package.json
index e5b6eec3d..66089b979 100644
--- a/packages/billing/package.json
+++ b/packages/billing/package.json
@@ -20,6 +20,7 @@
     "stripe": "^13.2.0"
   },
   "devDependencies": {
-    "@rallly/eslint-config": "workspace:*"
+    "@rallly/eslint-config": "workspace:*",
+    "@rallly/tsconfig": "workspace:*"
   }
 }
diff --git a/packages/languages/package.json b/packages/languages/package.json
index d8e9bfe13..d2f5d4096 100644
--- a/packages/languages/package.json
+++ b/packages/languages/package.json
@@ -11,6 +11,7 @@
     "negotiator": "^1.0.0"
   },
   "devDependencies": {
+    "@rallly/tsconfig": "workspace:*",
     "@types/negotiator": "^0.6.3"
   }
 }
diff --git a/packages/languages/src/get-preferred-locale.ts b/packages/languages/src/get-preferred-locale.ts
index 66094430a..ca31989ad 100644
--- a/packages/languages/src/get-preferred-locale.ts
+++ b/packages/languages/src/get-preferred-locale.ts
@@ -1,14 +1,21 @@
 import languages, { defaultLocale } from "./index";
 import Negotiator from "negotiator";
 import { match } from "@formatjs/intl-localematcher";
-import type { NextRequest } from "next/server";
 
 const locales = Object.keys(languages);
 
-export function getPreferredLocale(req: NextRequest) {
+export function getPreferredLocale({
+  acceptLanguageHeader,
+}: {
+  acceptLanguageHeader?: string;
+}) {
+  if (!acceptLanguageHeader) {
+    return defaultLocale;
+  }
+
   const preferredLanguages = new Negotiator({
     headers: {
-      "accept-language": req.headers.get("accept-language") ?? "",
+      "accept-language": acceptLanguageHeader,
     },
   })
     .languages()
diff --git a/packages/languages/tsconfig.json b/packages/languages/tsconfig.json
index a920fbfd9..419f67910 100644
--- a/packages/languages/tsconfig.json
+++ b/packages/languages/tsconfig.json
@@ -1,5 +1,5 @@
 {
-  "extends": "@rallly/tsconfig/react.json",
-  "include": ["**/*.ts"],
+  "extends": "@rallly/tsconfig/node.json",
+  "include": ["src/**/*.ts"],
   "exclude": ["node_modules"]
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 30d2ac4e6..3b697f87e 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -219,6 +219,9 @@ importers:
       '@rallly/ui':
         specifier: workspace:*
         version: link:../../packages/ui
+      '@rallly/utils':
+        specifier: workspace:*
+        version: link:../../packages/utils
       '@sentry/nextjs':
         specifier: ^8.49.0
         version: 8.55.0(@opentelemetry/context-async-hooks@1.30.1(@opentelemetry/api@1.9.0))(@opentelemetry/core@1.30.1(@opentelemetry/api@1.9.0))(@opentelemetry/instrumentation@0.57.2(@opentelemetry/api@1.9.0))(@opentelemetry/sdk-trace-base@1.30.1(@opentelemetry/api@1.9.0))(next@14.2.28(@babel/core@7.26.10)(@opentelemetry/api@1.9.0)(@playwright/test@1.52.0)(react-dom@18.3.1(react@18.3.1))(react@18.3.1))(react@18.3.1)(webpack@5.99.7(esbuild@0.25.3))
@@ -428,6 +431,9 @@ importers:
       '@rallly/eslint-config':
         specifier: workspace:*
         version: link:../eslint-config
+      '@rallly/tsconfig':
+        specifier: workspace:*
+        version: link:../tsconfig
 
   packages/database:
     dependencies:
@@ -557,6 +563,9 @@ importers:
         specifier: ^1.0.0
         version: 1.0.0
     devDependencies:
+      '@rallly/tsconfig':
+        specifier: workspace:*
+        version: link:../tsconfig
       '@types/negotiator':
         specifier: ^0.6.3
         version: 0.6.3