Welsh (cy)

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

Locale reference

Locale metadata

BCP 47 codecy

Native nameCymraeg

English nameWelsh

Languagecy

RegionNone (base locale)

ScriptLatn

Text directionLeft-to-right (LTR)

CLDR plural categorieszero, one, two, few, many, other

Estimated speakers~900,000

Intl API Live Output

DateTimeFormat

Short9/15/26

MediumSep 15, 2026

LongSeptember 15, 2026

FullTuesday, September 15, 2026

NumberFormat

Decimal1,234,567.89

Currency (USD)$9.99

Percent75%

Compact1.2M

RelativeTimeFormat

3 days ago

Output for: -3 days ago

ListFormat

apples, oranges, and bananas

Conjunction list: apples, oranges, bananas

CLDR Plural Rules

Categories supported by cy: zero, one, two, few, many, other

zeroExample number: 0

→ zero

oneExample number: 1

→ one

twoExample number: 2

→ two

fewExample number: 3

→ few

manyExample number: 11

→ 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: ['cy', 'en'],
  defaultLocale: 'en',
});

react-intl

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

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

i18next

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

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

export default i18n;