From 2b33abab2612028b216ceb96f68e0bf09c60ef4f Mon Sep 17 00:00:00 2001
From: nexariton <198056267+nexariton@users.noreply.github.com>
Date: Thu, 13 Nov 2025 16:11:41 +0100
Subject: [PATCH] fix: replace umlaut characters with ASCII equivalents in
 cleanTitle (#481)

Update the cleanTitle() function in utils.ts to replace umlaut characters with their ASCII transliterations
---
 packages/core/src/parser/utils.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/core/src/parser/utils.ts b/packages/core/src/parser/utils.ts
index ca252bff..5341a3df 100644
--- a/packages/core/src/parser/utils.ts
+++ b/packages/core/src/parser/utils.ts
@@ -84,7 +84,11 @@ export function normaliseTitle(title: string) {
 }
 
 export function cleanTitle(title: string) {
-  let cleaned = title.normalize('NFD');
+  const umlautMap: Record<string,string> = {
+    'Ä':'Ae','ä':'ae','Ö':'Oe','ö':'oe','Ü':'Ue','ü':'ue','ß':'ss'
+  };
+  // replace German umlauts with ASCII equivalents, then normalize to NFD
+  let cleaned = title.replace(/[ÄäÖöÜüß]/g, c => umlautMap[c]).normalize('NFD');
 
   for (const char of ['♪', '♫', '★', '☆', '♡', '♥', '-']) {
     cleaned = cleaned.replaceAll(char, ' ');