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shared/utils/money.ts

@@ -6,8 +6,16 @@ export function fromCents(cents: number): number {
   return cents / 100;
 }
 
+const LOCALE_BY_CURRENCY: Record<string, string> = {
+  EUR: 'de-DE',
+  USD: 'en-US',
+  GBP: 'en-GB',
+  CHF: 'fr-CH',
+};
+
 export function formatCurrency(cents: number, currency: string): string {
-  return new Intl.NumberFormat(undefined, {
+  const locale = LOCALE_BY_CURRENCY[currency] ?? 'de-DE';
+  return new Intl.NumberFormat(locale, {
     style: 'currency',
     currency,
   }).format(fromCents(cents));