--- title: Localization API description: >- The Localization API lets you translate strings, format numbers and dates, and read the buyer's language, country, and currency context. Use this API to build extensions that adapt their content and behavior to the customer's locale, including support for pluralization and dynamic values in translations. api_version: 2026-04 api_name: customer-account-ui-extensions source_url: html: >- https://shopify.dev/docs/api/customer-account-ui-extensions/latest/target-apis/platform-apis/localization-api md: >- https://shopify.dev/docs/api/customer-account-ui-extensions/latest/target-apis/platform-apis/localization-api.md --- # Localization API The Localization API lets you translate strings, format numbers and dates, and read the buyer's language, country, and currency context. Use this API to build extensions that adapt their content and behavior to the customer's locale, including support for pluralization and dynamic values in translations. Translation keys must be defined in static JSON locale files bundled with the extension. Dynamic runtime translation loading isn't supported. ### Use cases * **Display translated content**: Render UI strings in the customer's preferred language using translation keys defined in locale JSON files. * **Format numbers and currency**: Use `shopify.i18n.formatNumber()` to display numbers, prices, and quantities in the customer's locale format. * **Show country-specific messaging**: Read the customer's country from `shopify.localization.country` to conditionally display region-specific notices, shipping information, or promotions. * **Handle pluralization**: Use the `count` option in `shopify.i18n.translate()` to automatically select the correct plural form based on the customer's locale rules. ### Support Targets (24) ### Supported targets * [customer-account.​footer.​render-after](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/footer#footer-render-after-) * [customer-account.​order-index.​announcement.​render](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/order-actions#order-index-announcement-) * [customer-account.​order-index.​block.​render](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/order-actions#order-index-block-) * [customer-account.​order-status.​announcement.​render](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/order-status#order-status-announcement-) * [customer-account.​order-status.​block.​render](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/order-status#order-status-block-) * [customer-account.​order-status.​cart-line-item.​render-after](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/order-status#cart-line-item-render-after-) * [customer-account.​order-status.​cart-line-list.​render-after](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/order-status#cart-line-list-render-after-) * [customer-account.​order-status.​customer-information.​render-after](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/order-status#customer-information-render-after-) * [customer-account.​order-status.​fulfillment-details.​render-after](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/fulfillment-status#fulfillment-status-targets) * [customer-account.​order-status.​payment-details.​render-after](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/payments-and-returns#payments-and-returns-targets) * [customer-account.​order-status.​return-details.​render-after](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/payments-and-returns#return-details-render-after-) * [customer-account.​order-status.​unfulfilled-items.​render-after](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/fulfillment-status#unfulfilled-items-render-after-) * [customer-account.​order.​action.​menu-item.​render](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/order-actions#order-action-menu-item-) * [customer-account.​order.​action.​render](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/order-actions#order-action-) * [customer-account.​order.​page.​render](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/full-page#order-specific-full-page-) * [customer-account.​page.​render](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/full-page#customer-account-full-page-) * [customer-account.​profile.​addresses.​render-after](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/profile-page-default#profile-page-default-targets-) * [customer-account.​profile.​announcement.​render](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/profile-page-default#profile-announcement-) * [customer-account.​profile.​block.​render](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/profile-page-default#profile-block-) * [customer-account.​profile.​company-details.​render-after](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/profile-page-b2b#profile-page-b2b-targets-) * [customer-account.​profile.​company-location-addresses.​render-after](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/profile-page-b2b#company-location-addresses-render-after-) * [customer-account.​profile.​company-location-payment.​render-after](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/profile-page-b2b#company-location-payment-render-after-) * [customer-account.​profile.​company-location-staff.​render-after](https://shopify.dev/docs/api/customer-account-ui-extensions/2026-04/targets/profile-page-b2b#company-location-staff-render-after-) * customer-account.​profile.​payment.​render-after ### Properties The [`shopify` global object](https://shopify.dev/docs/api/customer-account-ui-extensions/latest#target-apis-define-what-your-extension-does) provides localization and translation utilities for customer account extensions. Access the following properties on `shopify` to translate strings, format values, and read the buyer's language and country context. * **i18n** **I18n** **required** Utilities for translating strings, formatting currencies, numbers, and dates according to the buyer's locale. Use this alongside `localization` to build fully localized extensions. * **localization** **Localization** **required** The buyer's language, country, and locale context. Use this to adapt your extension to the buyer's region and display localized content. ### I18n Utilities for translating strings, formatting currencies, numbers, and dates according to the buyer's locale. Use the I18n API alongside the Localization API to build fully localized extensions. * formatCurrency Returns a localized currency value. This function behaves like the standard \`Intl.NumberFormat()\` with a style of \`currency\` applied. It uses the buyer's locale by default. ```ts (number: number | bigint, options?: { inExtensionLocale?: boolean; } & NumberFormatOptions) => string ``` * formatDate Returns a localized date value. This function behaves like the standard \[\`Intl.DateTimeFormat()\`]\(https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global\_Objects/Intl/DateTimeFormat) and uses the buyer's locale by default. Formatting \[options]\(https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global\_Objects/Intl/DateTimeFormat#using\_options) can be passed in as options. ```ts (date: Date, options?: { inExtensionLocale?: boolean; } & DateTimeFormatOptions) => string ``` * formatNumber Returns a localized number. This function behaves like the standard \`Intl.NumberFormat()\` with a style of \`decimal\` applied. It uses the buyer's locale by default. ```ts (number: number | bigint, options?: { inExtensionLocale?: boolean; } & NumberFormatOptions) => string ``` * translate Returns translated content in the buyer's locale, as supported by the extension. - \`options.count\` is a special numeric value used in pluralization. - The other option keys and values are treated as replacements for interpolation. - If the replacements are all primitives, then \`translate()\` returns a single string. - If replacements contain UI components, then \`translate()\` returns an array of elements. ```ts I18nTranslate ``` ### I18nTranslate Translates a key from your extension's locale files into a localized string. Supports interpolation with placeholder replacements and pluralization via the special \`count\` option. ### Localization The buyer's language, country, currency, and timezone context. Use this to adapt your extension to the buyer's region and display localized content. * country The country context of the checkout, carried over from the cart. It updates when the buyer changes their shipping address country. Use this value to display region-specific content such as local support information or regional policies. The value is \`undefined\` if the buyer's country is unknown. Derived from the buyer's shipping address. Returns \`undefined\` until the buyer enters a shipping address. ```ts SubscribableSignalLike ``` * currency The currency that the buyer sees for money amounts in the checkout. Use this value to format prices and totals in the buyer's expected currency. ```ts SubscribableSignalLike ``` * extensionLanguage The best available language match for your extension based on the buyer's language. If the buyer's language is \`'fr-CA'\` but your extension supports only \`'fr'\`, this returns \`'fr'\`. If your extension doesn't support any variant of the buyer's language, this falls back to your extension's default locale (the \`.default.json\` translation file). Use this value to load the correct translation file for your extension. ```ts SubscribableSignalLike ``` * language The language the buyer sees in the checkout. This reflects the language selected by the buyer or determined by their browser settings, and might differ from the languages your extension supports. ```ts SubscribableSignalLike ``` * market The \[market]\(/docs/apps/build/markets) context of the checkout, carried over from the cart context. Markets group countries and regions with shared pricing, languages, and domains. The market context updates when the buyer changes the country of their shipping address. The value is \`undefined\` if the market is unknown. ```ts SubscribableSignalLike ``` * timezone The buyer's time zone, based on their browser or account settings. Use this value to format dates and times relative to the buyer's local time. ```ts SubscribableSignalLike ``` ### SubscribableSignalLike Represents a reactive signal interface that provides both immediate value access and subscription-based updates. Enables real-time synchronization with changing data through the observer pattern. This interface extends \`ReadonlySignalLike\` with deprecated fields that are still supported for backwards compatibility. * current The current value of the signal. Equivalent to \`.value\`, accessing this property subscribes to changes when used in a reactive context. ```ts T ``` * destroy Cleans up the subscription and releases any resources held by this signal. After calling \`destroy()\`, the signal stops receiving updates from the main thread. ```ts () => Promise ``` * subscribe Subscribes to value changes and calls the provided function whenever the value updates. Returns an unsubscribe function to clean up the subscription. Use to automatically react to changes in the signal's value. ```ts (fn: (value: T) => void) => () => void ``` * value The current value of the signal. This property provides immediate access to the current value without requiring subscription setup. Use for one-time value checks or initial setup. ```ts T ``` ### Country A buyer's country, identified by its ISO country code. * isoCode The two-letter country code in \[ISO 3166-1 alpha-2]\(https://en.wikipedia.org/wiki/ISO\_3166-1\_alpha-2) format. ```ts CountryCode ``` ### CountryCode ```ts 'AC' | 'AD' | 'AE' | 'AF' | 'AG' | 'AI' | 'AL' | 'AM' | 'AN' | 'AO' | 'AR' | 'AT' | 'AU' | 'AW' | 'AX' | 'AZ' | 'BA' | 'BB' | 'BD' | 'BE' | 'BF' | 'BG' | 'BH' | 'BI' | 'BJ' | 'BL' | 'BM' | 'BN' | 'BO' | 'BQ' | 'BR' | 'BS' | 'BT' | 'BV' | 'BW' | 'BY' | 'BZ' | 'CA' | 'CC' | 'CD' | 'CF' | 'CG' | 'CH' | 'CI' | 'CK' | 'CL' | 'CM' | 'CN' | 'CO' | 'CR' | 'CU' | 'CV' | 'CW' | 'CX' | 'CY' | 'CZ' | 'DE' | 'DJ' | 'DK' | 'DM' | 'DO' | 'DZ' | 'EC' | 'EE' | 'EG' | 'EH' | 'ER' | 'ES' | 'ET' | 'FI' | 'FJ' | 'FK' | 'FO' | 'FR' | 'GA' | 'GB' | 'GD' | 'GE' | 'GF' | 'GG' | 'GH' | 'GI' | 'GL' | 'GM' | 'GN' | 'GP' | 'GQ' | 'GR' | 'GS' | 'GT' | 'GW' | 'GY' | 'HK' | 'HM' | 'HN' | 'HR' | 'HT' | 'HU' | 'ID' | 'IE' | 'IL' | 'IM' | 'IN' | 'IO' | 'IQ' | 'IR' | 'IS' | 'IT' | 'JE' | 'JM' | 'JO' | 'JP' | 'KE' | 'KG' | 'KH' | 'KI' | 'KM' | 'KN' | 'KP' | 'KR' | 'KW' | 'KY' | 'KZ' | 'LA' | 'LB' | 'LC' | 'LI' | 'LK' | 'LR' | 'LS' | 'LT' | 'LU' | 'LV' | 'LY' | 'MA' | 'MC' | 'MD' | 'ME' | 'MF' | 'MG' | 'MK' | 'ML' | 'MM' | 'MN' | 'MO' | 'MQ' | 'MR' | 'MS' | 'MT' | 'MU' | 'MV' | 'MW' | 'MX' | 'MY' | 'MZ' | 'NA' | 'NC' | 'NE' | 'NF' | 'NG' | 'NI' | 'NL' | 'NO' | 'NP' | 'NR' | 'NU' | 'NZ' | 'OM' | 'PA' | 'PE' | 'PF' | 'PG' | 'PH' | 'PK' | 'PL' | 'PM' | 'PN' | 'PS' | 'PT' | 'PY' | 'QA' | 'RE' | 'RO' | 'RS' | 'RU' | 'RW' | 'SA' | 'SB' | 'SC' | 'SD' | 'SE' | 'SG' | 'SH' | 'SI' | 'SJ' | 'SK' | 'SL' | 'SM' | 'SN' | 'SO' | 'SR' | 'SS' | 'ST' | 'SV' | 'SX' | 'SY' | 'SZ' | 'TA' | 'TC' | 'TD' | 'TF' | 'TG' | 'TH' | 'TJ' | 'TK' | 'TL' | 'TM' | 'TN' | 'TO' | 'TR' | 'TT' | 'TV' | 'TW' | 'TZ' | 'UA' | 'UG' | 'UM' | 'US' | 'UY' | 'UZ' | 'VA' | 'VC' | 'VE' | 'VG' | 'VN' | 'VU' | 'WF' | 'WS' | 'XK' | 'YE' | 'YT' | 'ZA' | 'ZM' | 'ZW' | 'ZZ' ``` ### Currency * isoCode The three-letter currency code in \[ISO 4217]\(https://en.wikipedia.org/wiki/ISO\_4217) format, such as \`'USD'\`, \`'EUR'\`, or \`'CAD'\`. ```ts CurrencyCode ``` ### CurrencyCode ```ts 'AED' | 'AFN' | 'ALL' | 'AMD' | 'ANG' | 'AOA' | 'ARS' | 'AUD' | 'AWG' | 'AZN' | 'BAM' | 'BBD' | 'BDT' | 'BGN' | 'BHD' | 'BIF' | 'BMD' | 'BND' | 'BOB' | 'BOV' | 'BRL' | 'BSD' | 'BTN' | 'BWP' | 'BYN' | 'BZD' | 'CAD' | 'CDF' | 'CHE' | 'CHF' | 'CHW' | 'CLF' | 'CLP' | 'CNY' | 'COP' | 'COU' | 'CRC' | 'CUC' | 'CUP' | 'CVE' | 'CZK' | 'DJF' | 'DKK' | 'DOP' | 'DZD' | 'EGP' | 'ERN' | 'ETB' | 'EUR' | 'FJD' | 'FKP' | 'GBP' | 'GEL' | 'GHS' | 'GIP' | 'GMD' | 'GNF' | 'GTQ' | 'GYD' | 'HKD' | 'HNL' | 'HRK' | 'HTG' | 'HUF' | 'IDR' | 'ILS' | 'INR' | 'IQD' | 'IRR' | 'ISK' | 'JMD' | 'JOD' | 'JPY' | 'KES' | 'KGS' | 'KHR' | 'KMF' | 'KPW' | 'KRW' | 'KWD' | 'KYD' | 'KZT' | 'LAK' | 'LBP' | 'LKR' | 'LRD' | 'LSL' | 'LYD' | 'MAD' | 'MDL' | 'MGA' | 'MKD' | 'MMK' | 'MNT' | 'MOP' | 'MRU' | 'MUR' | 'MVR' | 'MWK' | 'MXN' | 'MXV' | 'MYR' | 'MZN' | 'NAD' | 'NGN' | 'NIO' | 'NOK' | 'NPR' | 'NZD' | 'OMR' | 'PAB' | 'PEN' | 'PGK' | 'PHP' | 'PKR' | 'PLN' | 'PYG' | 'QAR' | 'RON' | 'RSD' | 'RUB' | 'RWF' | 'SAR' | 'SBD' | 'SCR' | 'SDG' | 'SEK' | 'SGD' | 'SHP' | 'SLL' | 'SOS' | 'SRD' | 'SSP' | 'STN' | 'SVC' | 'SYP' | 'SZL' | 'THB' | 'TJS' | 'TMT' | 'TND' | 'TOP' | 'TRY' | 'TTD' | 'TWD' | 'TZS' | 'UAH' | 'UGX' | 'USD' | 'USN' | 'UYI' | 'UYU' | 'UYW' | 'UZS' | 'VES' | 'VND' | 'VUV' | 'WST' | 'XAF' | 'XAG' | 'XAU' | 'XBA' | 'XBB' | 'XBC' | 'XBD' | 'XCD' | 'XDR' | 'XOF' | 'XPD' | 'XPF' | 'XPT' | 'XSU' | 'XTS' | 'XUA' | 'XXX' | 'YER' | 'ZAR' | 'ZMW' | 'ZWL' ``` ### Language * isoCode The \[BCP-47]\(https://en.wikipedia.org/wiki/IETF\_language\_tag) language tag that identifies the language. This is a standardized code that might include a base language and an optional region subtag separated by a dash. For example, \`'en'\` represents English and \`'en-US'\` represents English as used in the United States. The region subtag follows the \[ISO 3166-1 alpha-2]\(https://en.wikipedia.org/wiki/ISO\_3166-1\_alpha-2) standard. ```ts string ``` ### Market A \[Shopify Market]\(/docs/apps/build/markets) that represents a group of one or more regions for international selling. * handle The human-readable, shop-scoped identifier for the market, such as \`'us'\` or \`'eu'\`. Merchants define these handles when configuring \[Shopify Markets]\(/docs/apps/build/markets). ```ts string ``` * id A globally-unique identifier for the market in the format \`gid://shopify/Market/\\`. ```ts string ``` ### Timezone ```ts 'Africa/Abidjan' | 'Africa/Algiers' | 'Africa/Bissau' | 'Africa/Cairo' | 'Africa/Casablanca' | 'Africa/Ceuta' | 'Africa/El_Aaiun' | 'Africa/Johannesburg' | 'Africa/Juba' | 'Africa/Khartoum' | 'Africa/Lagos' | 'Africa/Maputo' | 'Africa/Monrovia' | 'Africa/Nairobi' | 'Africa/Ndjamena' | 'Africa/Sao_Tome' | 'Africa/Tripoli' | 'Africa/Tunis' | 'Africa/Windhoek' | 'America/Adak' | 'America/Anchorage' | 'America/Araguaina' | 'America/Argentina/Buenos_Aires' | 'America/Argentina/Catamarca' | 'America/Argentina/Cordoba' | 'America/Argentina/Jujuy' | 'America/Argentina/La_Rioja' | 'America/Argentina/Mendoza' | 'America/Argentina/Rio_Gallegos' | 'America/Argentina/Salta' | 'America/Argentina/San_Juan' | 'America/Argentina/San_Luis' | 'America/Argentina/Tucuman' | 'America/Argentina/Ushuaia' | 'America/Asuncion' | 'America/Bahia' | 'America/Bahia_Banderas' | 'America/Barbados' | 'America/Belem' | 'America/Belize' | 'America/Boa_Vista' | 'America/Bogota' | 'America/Boise' | 'America/Cambridge_Bay' | 'America/Campo_Grande' | 'America/Cancun' | 'America/Caracas' | 'America/Cayenne' | 'America/Chicago' | 'America/Chihuahua' | 'America/Costa_Rica' | 'America/Cuiaba' | 'America/Danmarkshavn' | 'America/Dawson' | 'America/Dawson_Creek' | 'America/Denver' | 'America/Detroit' | 'America/Edmonton' | 'America/Eirunepe' | 'America/El_Salvador' | 'America/Fort_Nelson' | 'America/Fortaleza' | 'America/Glace_Bay' | 'America/Goose_Bay' | 'America/Grand_Turk' | 'America/Guatemala' | 'America/Guayaquil' | 'America/Guyana' | 'America/Halifax' | 'America/Havana' | 'America/Hermosillo' | 'America/Indiana/Indianapolis' | 'America/Indiana/Knox' | 'America/Indiana/Marengo' | 'America/Indiana/Petersburg' | 'America/Indiana/Tell_City' | 'America/Indiana/Vevay' | 'America/Indiana/Vincennes' | 'America/Indiana/Winamac' | 'America/Inuvik' | 'America/Iqaluit' | 'America/Jamaica' | 'America/Juneau' | 'America/Kentucky/Louisville' | 'America/Kentucky/Monticello' | 'America/La_Paz' | 'America/Lima' | 'America/Los_Angeles' | 'America/Maceio' | 'America/Managua' | 'America/Manaus' | 'America/Martinique' | 'America/Matamoros' | 'America/Mazatlan' | 'America/Menominee' | 'America/Merida' | 'America/Metlakatla' | 'America/Mexico_City' | 'America/Miquelon' | 'America/Moncton' | 'America/Monterrey' | 'America/Montevideo' | 'America/New_York' | 'America/Nipigon' | 'America/Nome' | 'America/Noronha' | 'America/North_Dakota/Beulah' | 'America/North_Dakota/Center' | 'America/North_Dakota/New_Salem' | 'America/Nuuk' | 'America/Ojinaga' | 'America/Panama' | 'America/Pangnirtung' | 'America/Paramaribo' | 'America/Phoenix' | 'America/Port-au-Prince' | 'America/Porto_Velho' | 'America/Puerto_Rico' | 'America/Punta_Arenas' | 'America/Rainy_River' | 'America/Rankin_Inlet' | 'America/Recife' | 'America/Regina' | 'America/Resolute' | 'America/Rio_Branco' | 'America/Santarem' | 'America/Santiago' | 'America/Santo_Domingo' | 'America/Sao_Paulo' | 'America/Scoresbysund' | 'America/Sitka' | 'America/St_Johns' | 'America/Swift_Current' | 'America/Tegucigalpa' | 'America/Thule' | 'America/Thunder_Bay' | 'America/Tijuana' | 'America/Toronto' | 'America/Vancouver' | 'America/Whitehorse' | 'America/Winnipeg' | 'America/Yakutat' | 'America/Yellowknife' | 'Antarctica/Casey' | 'Antarctica/Davis' | 'Antarctica/Macquarie' | 'Antarctica/Mawson' | 'Antarctica/Palmer' | 'Antarctica/Rothera' | 'Antarctica/Troll' | 'Antarctica/Vostok' | 'Asia/Almaty' | 'Asia/Amman' | 'Asia/Anadyr' | 'Asia/Aqtau' | 'Asia/Aqtobe' | 'Asia/Ashgabat' | 'Asia/Atyrau' | 'Asia/Baghdad' | 'Asia/Baku' | 'Asia/Bangkok' | 'Asia/Barnaul' | 'Asia/Beirut' | 'Asia/Bishkek' | 'Asia/Brunei' | 'Asia/Chita' | 'Asia/Choibalsan' | 'Asia/Colombo' | 'Asia/Damascus' | 'Asia/Dhaka' | 'Asia/Dili' | 'Asia/Dubai' | 'Asia/Dushanbe' | 'Asia/Famagusta' | 'Asia/Gaza' | 'Asia/Hebron' | 'Asia/Ho_Chi_Minh' | 'Asia/Hong_Kong' | 'Asia/Hovd' | 'Asia/Irkutsk' | 'Asia/Jakarta' | 'Asia/Jayapura' | 'Asia/Jerusalem' | 'Asia/Kabul' | 'Asia/Kamchatka' | 'Asia/Karachi' | 'Asia/Kathmandu' | 'Asia/Khandyga' | 'Asia/Kolkata' | 'Asia/Krasnoyarsk' | 'Asia/Kuala_Lumpur' | 'Asia/Kuching' | 'Asia/Macau' | 'Asia/Magadan' | 'Asia/Makassar' | 'Asia/Manila' | 'Asia/Nicosia' | 'Asia/Novokuznetsk' | 'Asia/Novosibirsk' | 'Asia/Omsk' | 'Asia/Oral' | 'Asia/Pontianak' | 'Asia/Pyongyang' | 'Asia/Qatar' | 'Asia/Qostanay' | 'Asia/Qyzylorda' | 'Asia/Riyadh' | 'Asia/Sakhalin' | 'Asia/Samarkand' | 'Asia/Seoul' | 'Asia/Shanghai' | 'Asia/Singapore' | 'Asia/Srednekolymsk' | 'Asia/Taipei' | 'Asia/Tashkent' | 'Asia/Tbilisi' | 'Asia/Tehran' | 'Asia/Thimphu' | 'Asia/Tokyo' | 'Asia/Tomsk' | 'Asia/Ulaanbaatar' | 'Asia/Urumqi' | 'Asia/Ust-Nera' | 'Asia/Vladivostok' | 'Asia/Yakutsk' | 'Asia/Yangon' | 'Asia/Yekaterinburg' | 'Asia/Yerevan' | 'Atlantic/Azores' | 'Atlantic/Bermuda' | 'Atlantic/Canary' | 'Atlantic/Cape_Verde' | 'Atlantic/Faroe' | 'Atlantic/Madeira' | 'Atlantic/Reykjavik' | 'Atlantic/South_Georgia' | 'Atlantic/Stanley' | 'Australia/Adelaide' | 'Australia/Brisbane' | 'Australia/Broken_Hill' | 'Australia/Darwin' | 'Australia/Eucla' | 'Australia/Hobart' | 'Australia/Lindeman' | 'Australia/Lord_Howe' | 'Australia/Melbourne' | 'Australia/Perth' | 'Australia/Sydney' | 'CET' | 'CST6CDT' | 'EET' | 'EST' | 'EST5EDT' | 'Etc/GMT' | 'Etc/GMT-1' | 'Etc/GMT-10' | 'Etc/GMT-11' | 'Etc/GMT-12' | 'Etc/GMT-13' | 'Etc/GMT-14' | 'Etc/GMT-2' | 'Etc/GMT-3' | 'Etc/GMT-4' | 'Etc/GMT-5' | 'Etc/GMT-6' | 'Etc/GMT-7' | 'Etc/GMT-8' | 'Etc/GMT-9' | 'Etc/GMT+1' | 'Etc/GMT+10' | 'Etc/GMT+11' | 'Etc/GMT+12' | 'Etc/GMT+2' | 'Etc/GMT+3' | 'Etc/GMT+4' | 'Etc/GMT+5' | 'Etc/GMT+6' | 'Etc/GMT+7' | 'Etc/GMT+8' | 'Etc/GMT+9' | 'Etc/UTC' | 'Europe/Amsterdam' | 'Europe/Andorra' | 'Europe/Astrakhan' | 'Europe/Athens' | 'Europe/Belgrade' | 'Europe/Berlin' | 'Europe/Brussels' | 'Europe/Bucharest' | 'Europe/Budapest' | 'Europe/Chisinau' | 'Europe/Copenhagen' | 'Europe/Dublin' | 'Europe/Gibraltar' | 'Europe/Helsinki' | 'Europe/Istanbul' | 'Europe/Kaliningrad' | 'Europe/Kiev' | 'Europe/Kirov' | 'Europe/Lisbon' | 'Europe/London' | 'Europe/Luxembourg' | 'Europe/Madrid' | 'Europe/Malta' | 'Europe/Minsk' | 'Europe/Monaco' | 'Europe/Moscow' | 'Europe/Oslo' | 'Europe/Paris' | 'Europe/Prague' | 'Europe/Riga' | 'Europe/Rome' | 'Europe/Samara' | 'Europe/Saratov' | 'Europe/Simferopol' | 'Europe/Sofia' | 'Europe/Stockholm' | 'Europe/Tallinn' | 'Europe/Tirane' | 'Europe/Ulyanovsk' | 'Europe/Uzhgorod' | 'Europe/Vienna' | 'Europe/Vilnius' | 'Europe/Volgograd' | 'Europe/Warsaw' | 'Europe/Zaporozhye' | 'Europe/Zurich' | 'HST' | 'Indian/Chagos' | 'Indian/Christmas' | 'Indian/Cocos' | 'Indian/Kerguelen' | 'Indian/Mahe' | 'Indian/Maldives' | 'Indian/Mauritius' | 'Indian/Reunion' | 'MET' | 'MST' | 'MST7MDT' | 'Pacific/Apia' | 'Pacific/Auckland' | 'Pacific/Bougainville' | 'Pacific/Chatham' | 'Pacific/Chuuk' | 'Pacific/Easter' | 'Pacific/Efate' | 'Pacific/Fakaofo' | 'Pacific/Fiji' | 'Pacific/Funafuti' | 'Pacific/Galapagos' | 'Pacific/Gambier' | 'Pacific/Guadalcanal' | 'Pacific/Guam' | 'Pacific/Honolulu' | 'Pacific/Kanton' | 'Pacific/Kiritimati' | 'Pacific/Kosrae' | 'Pacific/Kwajalein' | 'Pacific/Majuro' | 'Pacific/Marquesas' | 'Pacific/Nauru' | 'Pacific/Niue' | 'Pacific/Norfolk' | 'Pacific/Noumea' | 'Pacific/Pago_Pago' | 'Pacific/Palau' | 'Pacific/Pitcairn' | 'Pacific/Pohnpei' | 'Pacific/Port_Moresby' | 'Pacific/Rarotonga' | 'Pacific/Tahiti' | 'Pacific/Tarawa' | 'Pacific/Tongatapu' | 'Pacific/Wake' | 'Pacific/Wallis' | 'PST8PDT' | 'WET' ``` Examples ### Examples * #### Translating strings ##### Description Render a translated string from a locale file using \`shopify.i18n.translate()\`. This example displays a welcome message that automatically adapts to the customer's language. ##### jsx ```tsx /* See the locales/en.default.json tab for the translation keys and values for this example */ import '@shopify/ui-extensions/preact'; import {render} from 'preact'; export default async () => { render(, document.body); }; function Extension() { return ( {shopify.i18n.translate('welcomeMessage')} ); } ``` ##### locales/en.default.json ```json { "welcomeMessage": "Welcome to our store!" } ``` * #### Getting the country of the customer ##### Description Read the customer's country to conditionally render region-specific messaging. This example checks whether the customer is in Canada and displays a shipping delay warning if so. ##### jsx ```tsx /* See the locales/en.default.json tab for the translation keys and values for this example */ import '@shopify/ui-extensions/preact'; import {render} from 'preact'; export default async () => { render(, document.body); }; function Extension() { const countryCode = shopify.localization?.country?.value?.isoCode; if (countryCode === 'CA') { return ( {shopify.i18n.translate( 'canadaPostWarningMessage', )} ); } } ``` ##### locales/en.default.json ```json { "canadaPostWarningMessage": "Canada Post has issued a red delivery service alert for Ontario due to a severe snowstorm, suspending package delivery and collection for the week." } ``` * #### Translating strings with pluralization ##### Description Use the \`count\` option to render the correct plural form for the customer's locale. This example translates a loyalty points message that differs between singular and plural based on the point count. ##### jsx ```tsx /* See the locales/en.default.json tab for the translation keys and values for this example */ import '@shopify/ui-extensions/preact'; import {render} from 'preact'; export default async () => { render(, document.body); }; function Extension() { const points = 10000; const formattedPoints = shopify.i18n.formatNumber(points); // Translate the loyalty points message, using pluralization to differentiate messages const loyaltyPointsMsg = shopify.i18n.translate( 'loyaltyPoints', { count: points, formattedPoints, }, ); return {loyaltyPointsMsg}; } ``` ##### locales/en.default.json ```json { "loyaltyPoints": { "one": "You have {{formattedPoints}} loyalty point", "other": "You have {{formattedPoints}} loyalty points" } } ``` *** ## Best practices * **Define a default locale file**: Always include a `locales/en.default.json` file as the fallback. This ensures your extension displays meaningful content even when a translation for the customer's language isn't available. * **Use dynamic values instead of string concatenation**: Pass variables through the `translate()` options object (for example, `{{formattedPoints}}`) rather than concatenating translated fragments. This keeps translations flexible across languages with different word orders. * **Format numbers with `shopify.i18n.formatNumber()`**: Don't manually format numbers with `toLocaleString()`. The built-in formatter respects the store's locale configuration and produces consistent results. * **Guard against missing localization data**: Check that `shopify.localization.country` and other localization properties are defined before using them. These values load asynchronously and may be `undefined` on the initial render. *** ## Limitations * The `translate()` method only supports the pluralization categories defined by the Unicode CLDR for the active locale (for example, `one`, `other`, `few`, `many`). Custom plural categories aren't supported. * Country and language values reflect the customer's current session context. They can't be overridden programmatically by the extension. ***