Korean (ko)

Complete reference for the ko locale — live Intl API output, CLDR plural rules, and framework config snippets.

Locale reference

Korean

Locale metadata

BCP 47 codeko

Native name한국어

English nameKorean

Languageko

RegionNone (base locale)

ScriptKore

Text directionLeft-to-right (LTR)

CLDR plural categoriesother

Estimated speakers~80,000,000

Intl API Live Output

DateTimeFormat

Short26. 9. 14.

Medium2026. 9. 14.

Long2026년 9월 14일

Full2026년 9월 14일 월요일

NumberFormat

Decimal1,234,567.89

Currency (USD)US$9.99

Percent75%

Compact120만

RelativeTimeFormat

3일 전

Output for: -3 days ago

ListFormat

apples, oranges 및 bananas

Conjunction list: apples, oranges, bananas

CLDR Plural Rules

Categories supported by ko: other

otherExample number: 100

→ other

Framework Config Snippets

next-intl

// next-intl configuration
// next.config.ts
import createNextIntlPlugin from 'next-intl/plugin';
const withNextIntl = createNextIntlPlugin();
export default withNextIntl({});

// i18n/routing.ts
import { defineRouting } from 'next-intl/routing';
export const routing = defineRouting({
  locales: ['ko', 'en'],
  defaultLocale: 'en',
});

react-intl

// react-intl configuration
import { IntlProvider } from 'react-intl';
import messages from './messages/ko.json';

function App() {
  return (
    <IntlProvider locale="ko" messages={messages}>
      {/* your app */}
    </IntlProvider>
  );
}

i18next

// i18next configuration
import i18n from 'i18next';
import { initReactI18next } from 'react-i18next';

i18n
  .use(initReactI18next)
  .init({
    lng: 'ko',
    fallbackLng: 'en',
    resources: {
      'ko': {
        translation: require('./locales/ko/translation.json'),
      },
    },
  });

export default i18n;