JavaScript i18n: Browser-native Internationalisering met de Intl API

// Using the built-in Intl API
const formatter = new Intl.NumberFormat('de-DE', {
  style: 'currency',
  currency: 'EUR',
});
console.log(formatter.format(1234.56)); // "1.234,56 €"

// Date formatting
const date = new Intl.DateTimeFormat('ja-JP', {
  year: 'numeric',
  month: 'long',
  day: 'numeric',
});
console.log(date.format(new Date())); // "2026年3月2日"

// Pluralization
const plural = new Intl.PluralRules('en');
const suffixes = { one: 'st', two: 'nd', few: 'rd', other: 'th' };
function ordinal(n) {
  return `${n}${suffixes[plural.select(n)]}`;
}