diff --git a/packages/localize-monetary-amount/README.md b/packages/localize-monetary-amount/README.md
new file mode 100644
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+++ b/packages/localize-monetary-amount/README.md
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+# localize-monetary-amount
+
+Locale- (language and geo) and currency-aware formatting of exact monetary amounts.
+
+What this package does:
+  * Number localization (separator symbols, grouping conventions)
+  * Integer arithmetic with all digits of precision. No floats.
+  * Designed for displaying product prices in catalogs, carts, checkout, and receipts.
+  * No dependencies
+  
+What this package doesn't do:
+  * Arithmetic on monetary amounts; formatting only
+  * Conversion between currencies
+  * Localize digit symbols (Hindu-Arabic digits only)
+  * Take options. Locale preferences are hardcoded. Please submit an issue if a locale looks off.
+
+## Example usage
+
+You'll need:
+  * An ISO 631-1 language code with an optional ISO 3166-1 alpha-2 region code, separated by a hyphen. Examples: `en`, `en-gb`, `fr-be`.
+  * An ISO 4217 currency code. Examples: 'USD', 'JPY', 'BRL'.
+  * An integer number of _minor units_. This is the minimal unit of your currency; e.g. cents for USD, yen for JPY. May be positive or negative.
+
+If the fractional part is zero it is omitted unless the locale prefers otherwise.
+
+```js
+import localizeMonetaryAmount from 'localize-monetary-amount';
+
+// Strips zero minor units:
+localizeMonetaryAmount( 'en-us', 'USD', 500 ); // '$5'
+
+// Uses non-breaking spaces:
+localizeMonetaryAmount( 'fr-ca', 'CAD', 500000 ); // '$5\u00A0000\u00A0CAD'
+```
diff --git a/packages/localize-monetary-amount/jest.config.js b/packages/localize-monetary-amount/jest.config.js
new file mode 100644
index 0000000000000..2cf7dce3df015
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+++ b/packages/localize-monetary-amount/jest.config.js
@@ -0,0 +1 @@
+module.exports = { rootDir: __dirname, testMatch: [ '**/test/**/*.[jt]s?(x)' ] };
diff --git a/packages/localize-monetary-amount/package.json b/packages/localize-monetary-amount/package.json
new file mode 100644
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--- /dev/null
+++ b/packages/localize-monetary-amount/package.json
@@ -0,0 +1,35 @@
+{
+	"name": "@automattic/localize-monetary-amount",
+	"version": "1.0.0",
+	"description": "Batteries included localized currency formatting",
+	"main": "dist/cjs/index.js",
+	"module": "dist/esm/index.js",
+	"sideEffects": false,
+	"scripts": {
+		"clean": "npx rimraf dist",
+		"prepublish": "npm run clean"
+	},
+	"files": [
+		"dist",
+		"src"
+	],
+	"keywords": [
+		"localization",
+		"currency",
+		"automattic"
+	],
+	"publishConfig": {
+		"access": "public"
+	},
+	"repository": {
+		"type": "git",
+		"url": "git+https://github.com/Automattic/wp-calypso.git",
+		"directory": "packages/localize-monetary-amount"
+	},
+	"author": "@automattic",
+	"license": "GPL-2.0-or-later",
+	"bugs": {
+		"url": "https://github.com/Automattic/wp-calypso/issues"
+	},
+	"homepage": "https://github.com/Automattic/wp-calypso/tree/master/packages/localized-monetary-amount#readme"
+}
diff --git a/packages/localize-monetary-amount/src/currency-code.ts b/packages/localize-monetary-amount/src/currency-code.ts
new file mode 100644
index 0000000000000..723b737c720c8
--- /dev/null
+++ b/packages/localize-monetary-amount/src/currency-code.ts
@@ -0,0 +1,354 @@
+/**
+ * Sum type over ISO 4217 currency codes.
+ *
+ *   @examples 'USD', 'JPY', 'BRL'
+ */
+export type CurrencyCode =
+	| 'AED'
+	| 'AFN'
+	| 'ALL'
+	| 'AMD'
+	| 'ANG'
+	| 'AOA'
+	| 'ARS'
+	| 'AUD'
+	| 'AWG'
+	| 'AZN'
+	| 'BAM'
+	| 'BBD'
+	| 'BDT'
+	| 'BGN'
+	| 'BHD'
+	| 'BIF'
+	| 'BMD'
+	| 'BND'
+	| 'BOB'
+	| 'BRL'
+	| 'BSD'
+	| 'BTC'
+	| 'BTN'
+	| 'BWP'
+	| 'BYN'
+	| 'BZD'
+	| 'CAD'
+	| 'CDF'
+	| 'CHF'
+	| 'CLF'
+	| 'CLP'
+	| 'CNH'
+	| 'CNY'
+	| 'COP'
+	| 'CRC'
+	| 'CUC'
+	| 'CUP'
+	| 'CVE'
+	| 'CZK'
+	| 'DJF'
+	| 'DKK'
+	| 'DOP'
+	| 'DZD'
+	| 'EGP'
+	| 'ERN'
+	| 'ETB'
+	| 'EUR'
+	| 'FJD'
+	| 'FKP'
+	| 'GBP'
+	| 'GEL'
+	| 'GGP'
+	| 'GHS'
+	| 'GIP'
+	| 'GMD'
+	| 'GNF'
+	| 'GTQ'
+	| 'GYD'
+	| 'HKD'
+	| 'HNL'
+	| 'HRK'
+	| 'HTG'
+	| 'HUF'
+	| 'IDR'
+	| 'ILS'
+	| 'IMP'
+	| 'INR'
+	| 'IQD'
+	| 'IRR'
+	| 'ISK'
+	| 'JEP'
+	| 'JMD'
+	| 'JOD'
+	| 'JPY'
+	| 'KES'
+	| 'KGS'
+	| 'KHR'
+	| 'KID'
+	| 'KMF'
+	| 'KPW'
+	| 'KRW'
+	| 'KWD'
+	| 'KYD'
+	| 'KZT'
+	| 'LAK'
+	| 'LBP'
+	| 'LKR'
+	| 'LRD'
+	| 'LSL'
+	| 'LYD'
+	| 'MAD'
+	| 'MDL'
+	| 'MGA'
+	| 'MKD'
+	| 'MMK'
+	| 'MNT'
+	| 'MOP'
+	| 'MRO'
+	| 'MRU'
+	| 'MUR'
+	| 'MVR'
+	| 'MWK'
+	| 'MXN'
+	| 'MYR'
+	| 'MZN'
+	| 'NAD'
+	| 'NGN'
+	| 'NIO'
+	| 'NOK'
+	| 'NPR'
+	| 'NZD'
+	| 'OMR'
+	| 'PAB'
+	| 'PEN'
+	| 'PGK'
+	| 'PHP'
+	| 'PKR'
+	| 'PLN'
+	| 'PRB'
+	| 'PYG'
+	| 'QAR'
+	| 'RON'
+	| 'RSD'
+	| 'RUB'
+	| 'RWF'
+	| 'SAR'
+	| 'SBD'
+	| 'SCR'
+	| 'SDG'
+	| 'SEK'
+	| 'SGD'
+	| 'SHP'
+	| 'SLL'
+	| 'SLS'
+	| 'SOS'
+	| 'SRD'
+	| 'SSP'
+	| 'STD'
+	| 'STN'
+	| 'SVC'
+	| 'SYP'
+	| 'SZL'
+	| 'THB'
+	| 'TJS'
+	| 'TMT'
+	| 'TND'
+	| 'TOP'
+	| 'TRY'
+	| 'TTD'
+	| 'TVD'
+	| 'TWD'
+	| 'TZS'
+	| 'UAH'
+	| 'UGX'
+	| 'USD'
+	| 'UYU'
+	| 'UYW'
+	| 'UZS'
+	| 'VEF'
+	| 'VES'
+	| 'VND'
+	| 'VUV'
+	| 'WST'
+	| 'XAF'
+	| 'XCD'
+	| 'XOF'
+	| 'XPF'
+	| 'YER'
+	| 'ZAR'
+	| 'ZMW';
+
+/**
+ * Number of minor units per major unit. When expressed as a power
+ * of 10 this is called the exponent. Some currencies have non-integer
+ * exponents (e.g. Madagascar) so we return the raw number instead.
+ * Data comes from ISO 4217.
+ *
+ * @see https://www.iso.org/iso-4217-currency-codes.html
+ *
+ * @param {CurrencyCode} currencyCode
+ *   ISO 4217 currency code. Examples: 'USD', 'JPY', 'BRL'.
+ * @returns {number} Number of minor currency units per major unit
+ */
+export function minorUnitsPerMajorUnit( currencyCode: CurrencyCode ) {
+	switch ( currencyCode ) {
+		// Let's catch the common cases first
+		case 'AUD': // Australian dollar
+		case 'BRL': // Brazilian real
+		case 'CAD': // Canadian dollar
+		case 'USD': // US dollar
+			return 100;
+
+		case 'BIF': // Burundian franc
+		case 'CLP': // Chilean peso
+		case 'DJF': // Djibouti franc
+		case 'GNF': // Guinean franc
+		case 'ISK': // Icelandic króna
+		case 'JPY': // Yen
+		case 'KMF': // Comorian franc
+		case 'KRW': // Won
+		case 'PYG': // Guarani
+		case 'RWF': // Rwanda franc
+		case 'UGX': // Uganda shilling
+		case 'UYU': // Uruguay peso en unidades indexadas
+		case 'VUV': // Vatu
+		case 'VND': // Vietnamese dong
+		case 'XAF': // CFA Franc BEAC
+		case 'XOF': // CFA Franc BCEAO
+		case 'XPF': // CFP Franc
+			return 1;
+
+		case 'CLF': // Unidad de Fomento
+		case 'UYW': // Unidad Previsional
+			return 10000;
+
+		case 'BHD': // Bahraini dinar
+		case 'IQD': // Iraqi dinar
+		case 'JOD': // Jordanian dinar
+		case 'KWD': // Kuwaiti dinar
+		case 'LYD': // Libyan dinar
+		case 'OMR': // Rial Omani
+		case 'TND': // Tunisian dinar
+			return 1000;
+
+		case 'MGA': // Malagasy ariary
+		case 'MRU': // Mauritanian ouguiya
+			return 5;
+
+		default:
+			return 100;
+	}
+}
+
+/**
+ * Detects currencies with globally unique symbols. These are
+ * nice because they do not require disambiguation.
+ *
+ * @param {CurrencyCode} currencyCode
+ *   ISO 4217 currency code. Examples: 'USD', 'JPY', 'BRL'.
+ * @returns {boolean}
+ *   True if the currency's symbol is unique
+ */
+export function hasUniqueLocalSymbol( currencyCode: CurrencyCode ): boolean {
+	const currenciesWithUniqueSymbols = [
+		'AED',
+		'AFN',
+		'ALL',
+		'AMD',
+		'ANG',
+		'AOA',
+		'AWG',
+		'AZN',
+		'BAM',
+		'BDT',
+		'BGN',
+		'BHD',
+		'BOB',
+		'BRL',
+		'BTN',
+		'BWP',
+		'BYN',
+		'CHF',
+		'CNY',
+		'CRC',
+		'CZK',
+		'DZD',
+		'EGP',
+		'ERN',
+		'ETB',
+		'EUR',
+		'GEL',
+		'GHS',
+		'GMD',
+		'GTQ',
+		'HNL',
+		'HRK',
+		'HTG',
+		'HUF',
+		'IDR',
+		'ILS',
+		'INR',
+		'IQD',
+		'IRR',
+		'JOD',
+		'JPY',
+		'KGS',
+		'KHR',
+		'KWD',
+		'KZT',
+		'LAK',
+		'LBP',
+		'LKR',
+		'LSL',
+		'LYD',
+		'MAD',
+		'MDL',
+		'MGA',
+		'MKD',
+		'MMK',
+		'MNT',
+		'MOP',
+		'MRU',
+		'MVR',
+		'MWK',
+		'MYR',
+		'MZN',
+		'NGN',
+		'NIO',
+		'NPR',
+		'OMR',
+		'PAB',
+		'PEN',
+		'PGK',
+		'PHP',
+		'PLN',
+		'PRB',
+		'PYG',
+		'QAR',
+		'RON',
+		'RSD',
+		'RUB',
+		'SAR',
+		'SDG',
+		'SLL',
+		'SLS',
+		'STN',
+		'SYP',
+		'SZL',
+		'THB',
+		'TJS',
+		'TMT',
+		'TND',
+		'TOP',
+		'TRY',
+		'UAH',
+		'UZS',
+		'VES',
+		'VND',
+		'VUV',
+		'WST',
+		'XPF',
+		'YER',
+		'ZAR',
+		'ZMW',
+	];
+
+	return currenciesWithUniqueSymbols.includes( currencyCode );
+}
diff --git a/packages/localize-monetary-amount/src/english-currency-name.ts b/packages/localize-monetary-amount/src/english-currency-name.ts
new file mode 100644
index 0000000000000..61475fc5a37fb
--- /dev/null
+++ b/packages/localize-monetary-amount/src/english-currency-name.ts
@@ -0,0 +1,347 @@
+/**
+ * Internal dependencies
+ */
+import { CurrencyCode } from './currency-code';
+
+/**
+ * Human readable name (in English) for a given currency code.
+ * For e.g. tooltips on the frontend.
+ *
+ * @throws on unrecognized codes
+ *
+ * @param {CurrencyCode} currencyCode
+ *   ISO 4217 currency code. Examples: 'USD', 'JPY', 'BRL'.
+ * @returns {string}
+ *   Human readable currency name in English
+ */
+export function englishCurrencyName( currencyCode: CurrencyCode ): string {
+	switch ( currencyCode ) {
+		case 'AED':
+			return 'United Arab Emirates Dirham';
+		case 'AFN':
+			return 'Afghan Afghani';
+		case 'ALL':
+			return 'Albanian Lek';
+		case 'AMD':
+			return 'Armenian Dram';
+		case 'ANG':
+			return 'Netherlands Antillean Guilder';
+		case 'AOA':
+			return 'Angolan Kwanza';
+		case 'ARS':
+			return 'Argentine Peso';
+		case 'AUD':
+			return 'Australian Dollar';
+		case 'AWG':
+			return 'Aruban Florin';
+		case 'AZN':
+			return 'Azerbaijani Manat';
+		case 'BAM':
+			return 'Bosnia-Herzegovina Convertible Mark';
+		case 'BBD':
+			return 'Barbadian Dollar';
+		case 'BDT':
+			return 'Bangladeshi Taka';
+		case 'BGN':
+			return 'Bulgarian Lev';
+		case 'BHD':
+			return 'Bahraini Dinar';
+		case 'BIF':
+			return 'Burundian Franc';
+		case 'BMD':
+			return 'Bermudan Dollar';
+		case 'BND':
+			return 'Brunei Dollar';
+		case 'BOB':
+			return 'Bolivian Boliviano';
+		case 'BRL':
+			return 'Brazilian Real';
+		case 'BSD':
+			return 'Bahamian Dollar';
+		case 'BTC':
+			return 'Bitcoin';
+		case 'BTN':
+			return 'Bhutanese Ngultrum';
+		case 'BWP':
+			return 'Botswanan Pula';
+		case 'BYN':
+			return 'Belarusian Ruble';
+		case 'BZD':
+			return 'Belize Dollar';
+		case 'CAD':
+			return 'Canadian Dollar';
+		case 'CDF':
+			return 'Congolese Franc';
+		case 'CHF':
+			return 'Swiss Franc';
+		case 'CLF':
+			return 'Chilean Unit of Account (UF)';
+		case 'CLP':
+			return 'Chilean Peso';
+		case 'CNH':
+			return 'Chinese Yuan (Offshore)';
+		case 'CNY':
+			return 'Chinese Yuan';
+		case 'COP':
+			return 'Colombian Peso';
+		case 'CRC':
+			return 'Costa Rican Colón';
+		case 'CUC':
+			return 'Cuban Convertible Peso';
+		case 'CUP':
+			return 'Cuban Peso';
+		case 'CVE':
+			return 'Cape Verdean Escudo';
+		case 'CZK':
+			return 'Czech Republic Koruna';
+		case 'DJF':
+			return 'Djiboutian Franc';
+		case 'DKK':
+			return 'Danish Krone';
+		case 'DOP':
+			return 'Dominican Peso';
+		case 'DZD':
+			return 'Algerian Dinar';
+		case 'EGP':
+			return 'Egyptian Pound';
+		case 'ERN':
+			return 'Eritrean Nakfa';
+		case 'ETB':
+			return 'Ethiopian Birr';
+		case 'EUR':
+			return 'Euro';
+		case 'FJD':
+			return 'Fijian Dollar';
+		case 'FKP':
+			return 'Falkland Islands Pound';
+		case 'GBP':
+			return 'British Pound Sterling';
+		case 'GEL':
+			return 'Georgian Lari';
+		case 'GGP':
+			return 'Guernsey Pound';
+		case 'GHS':
+			return 'Ghanaian Cedi';
+		case 'GIP':
+			return 'Gibraltar Pound';
+		case 'GMD':
+			return 'Gambian Dalasi';
+		case 'GNF':
+			return 'Guinean Franc';
+		case 'GTQ':
+			return 'Guatemalan Quetzal';
+		case 'GYD':
+			return 'Guyanaese Dollar';
+		case 'HKD':
+			return 'Hong Kong Dollar';
+		case 'HNL':
+			return 'Honduran Lempira';
+		case 'HRK':
+			return 'Croatian Kuna';
+		case 'HTG':
+			return 'Haitian Gourde';
+		case 'HUF':
+			return 'Hungarian Forint';
+		case 'IDR':
+			return 'Indonesian Rupiah';
+		case 'ILS':
+			return 'Israeli New Sheqel';
+		case 'IMP':
+			return 'Manx pound';
+		case 'INR':
+			return 'Indian Rupee';
+		case 'IQD':
+			return 'Iraqi Dinar';
+		case 'IRR':
+			return 'Iranian Rial';
+		case 'ISK':
+			return 'Icelandic Króna';
+		case 'JEP':
+			return 'Jersey Pound';
+		case 'JMD':
+			return 'Jamaican Dollar';
+		case 'JOD':
+			return 'Jordanian Dinar';
+		case 'JPY':
+			return 'Japanese Yen';
+		case 'KES':
+			return 'Kenyan Shilling';
+		case 'KGS':
+			return 'Kyrgystani Som';
+		case 'KHR':
+			return 'Cambodian Riel';
+		case 'KMF':
+			return 'Comorian Franc';
+		case 'KPW':
+			return 'North Korean Won';
+		case 'KRW':
+			return 'South Korean Won';
+		case 'KWD':
+			return 'Kuwaiti Dinar';
+		case 'KYD':
+			return 'Cayman Islands Dollar';
+		case 'KZT':
+			return 'Kazakhstani Tenge';
+		case 'LAK':
+			return 'Laotian Kip';
+		case 'LBP':
+			return 'Lebanese Pound';
+		case 'LKR':
+			return 'Sri Lankan Rupee';
+		case 'LRD':
+			return 'Liberian Dollar';
+		case 'LSL':
+			return 'Lesotho Loti';
+		case 'LYD':
+			return 'Libyan Dinar';
+		case 'MAD':
+			return 'Moroccan Dirham';
+		case 'MDL':
+			return 'Moldovan Leu';
+		case 'MGA':
+			return 'Malagasy Ariary';
+		case 'MKD':
+			return 'Macedonian Denar';
+		case 'MMK':
+			return 'Myanma Kyat';
+		case 'MNT':
+			return 'Mongolian Tugrik';
+		case 'MOP':
+			return 'Macanese Pataca';
+		case 'MRO':
+			return 'Mauritanian Ouguiya';
+		case 'MUR':
+			return 'Mauritian Rupee';
+		case 'MVR':
+			return 'Maldivian Rufiyaa';
+		case 'MWK':
+			return 'Malawian Kwacha';
+		case 'MXN':
+			return 'Mexican Peso';
+		case 'MYR':
+			return 'Malaysian Ringgit';
+		case 'MZN':
+			return 'Mozambican Metical';
+		case 'NAD':
+			return 'Namibian Dollar';
+		case 'NGN':
+			return 'Nigerian Naira';
+		case 'NIO':
+			return 'Nicaraguan Córdoba';
+		case 'NOK':
+			return 'Norwegian Krone';
+		case 'NPR':
+			return 'Nepalese Rupee';
+		case 'NZD':
+			return 'New Zealand Dollar';
+		case 'OMR':
+			return 'Omani Rial';
+		case 'PAB':
+			return 'Panamanian Balboa';
+		case 'PEN':
+			return 'Peruvian Nuevo Sol';
+		case 'PGK':
+			return 'Papua New Guinean Kina';
+		case 'PHP':
+			return 'Philippine Peso';
+		case 'PKR':
+			return 'Pakistani Rupee';
+		case 'PLN':
+			return 'Polish Zloty';
+		case 'PYG':
+			return 'Paraguayan Guarani';
+		case 'QAR':
+			return 'Qatari Rial';
+		case 'RON':
+			return 'Romanian Leu';
+		case 'RSD':
+			return 'Serbian Dinar';
+		case 'RUB':
+			return 'Russian Ruble';
+		case 'RWF':
+			return 'Rwandan Franc';
+		case 'SAR':
+			return 'Saudi Riyal';
+		case 'SBD':
+			return 'Solomon Islands Dollar';
+		case 'SCR':
+			return 'Seychellois Rupee';
+		case 'SDG':
+			return 'Sudanese Pound';
+		case 'SEK':
+			return 'Swedish Krona';
+		case 'SGD':
+			return 'Singapore Dollar';
+		case 'SHP':
+			return 'Saint Helena Pound';
+		case 'SLL':
+			return 'Sierra Leonean Leone';
+		case 'SOS':
+			return 'Somali Shilling';
+		case 'SRD':
+			return 'Surinamese Dollar';
+		case 'SSP':
+			return 'South Sudanese Pound';
+		case 'STD':
+			return 'São Tomé and Príncipe Dobra';
+		case 'SVC':
+			return 'Salvadoran Colón';
+		case 'SYP':
+			return 'Syrian Pound';
+		case 'SZL':
+			return 'Swazi Lilangeni';
+		case 'THB':
+			return 'Thai Baht';
+		case 'TJS':
+			return 'Tajikistani Somoni';
+		case 'TMT':
+			return 'Turkmenistani Manat';
+		case 'TND':
+			return 'Tunisian Dinar';
+		case 'TOP':
+			return 'Tongan Paanga';
+		case 'TRY':
+			return 'Turkish Lira';
+		case 'TTD':
+			return 'Trinidad and Tobago Dollar';
+		case 'TWD':
+			return 'New Taiwan Dollar';
+		case 'TZS':
+			return 'Tanzanian Shilling';
+		case 'UAH':
+			return 'Ukrainian Hryvnia';
+		case 'UGX':
+			return 'Ugandan Shilling';
+		case 'USD':
+			return 'United States Dollar';
+		case 'UYU':
+			return 'Uruguayan Peso';
+		case 'UZS':
+			return 'Uzbekistan Som';
+		case 'VEF':
+			return 'Venezuelan Bolívar Fuerte';
+		case 'VND':
+			return 'Vietnamese Dong';
+		case 'VUV':
+			return 'Vanuatu Vatu';
+		case 'WST':
+			return 'Samoan Tala';
+		case 'XAF':
+			return 'CFA Franc BEAC';
+		case 'XCD':
+			return 'East Caribbean Dollar';
+		case 'XOF':
+			return 'CFA Franc BCEAO';
+		case 'XPF':
+			return 'CFP Franc';
+		case 'YER':
+			return 'Yemeni Rial';
+		case 'ZAR':
+			return 'South African Rand';
+		case 'ZMW':
+			return 'Zambian Kwacha';
+
+		default:
+			throw 'Currency not supported: ' + currencyCode;
+	}
+}
diff --git a/packages/localize-monetary-amount/src/index.ts b/packages/localize-monetary-amount/src/index.ts
new file mode 100644
index 0000000000000..526a88e0372ce
--- /dev/null
+++ b/packages/localize-monetary-amount/src/index.ts
@@ -0,0 +1,14 @@
+/**
+ * Internal dependencies
+ */
+import { localizeMonetaryAmount } from './localize-monetary-amount';
+import { englishCurrencyName } from './english-currency-name';
+import { CurrencyCode } from './currency-code';
+
+export {
+	// Types
+	CurrencyCode,
+	// Utilities
+	localizeMonetaryAmount,
+	englishCurrencyName,
+};
diff --git a/packages/localize-monetary-amount/src/localize-monetary-amount.ts b/packages/localize-monetary-amount/src/localize-monetary-amount.ts
new file mode 100644
index 0000000000000..9c0e0bfc90465
--- /dev/null
+++ b/packages/localize-monetary-amount/src/localize-monetary-amount.ts
@@ -0,0 +1,980 @@
+/**
+ * Internal dependencies
+ */
+import { CurrencyCode, minorUnitsPerMajorUnit, hasUniqueLocalSymbol } from './currency-code';
+
+/**
+ * Format a monetary amount according to the custom of a given linguistic
+ * and geographic locale.
+ *
+ *
+ * THE PROBLEM
+ * ===========
+ *
+ * Idiomatic formatting of monetary amounts depends on (1) the currency,
+ * (2) the user's preferred language, and sometimes (3) the user's location.
+ * Several questions have to be answered before rendering an amount as text.
+ *
+ *   (1) What currency symbol is used?
+ *   (2) If the currency symbol is not unique, how is it disambiguated?
+ *         (e.g. '$' is severely overloaded.)
+ *   (3) What symbol is used for the radix point?
+ *         (this is the '.' in '$1.00')
+ *   (4) What symbol is used to separate digit groups in large integers?
+ *         (this is the ',' in '$1,000')
+ *   (5) How are the digits of large integers grouped for readability?
+ *         (usually in groups of three, but not always!)
+ *   (6) Does the currency symbol appear to the left or the right of the number?
+ *         (e.g. rtl languages)
+ *
+ * Answers to all of these can vary across the world, and getting it right is
+ * an important part of localization. Seeing numbers written in an unfamiliar
+ * way is bad UX and erodes trust. We can do better!
+ *
+ *
+ * OUR STRATEGY
+ * ============
+ *
+ * At a high level, this code is based on the following assumption: the single
+ * most important predictor of a user's preferred currency format is their
+ * *language*, possibly supplemented by their *country*, and after that their
+ * chosen *currency*. Here's why.
+ *
+ *     (1) Formatting customs vary by /country/ in general because trade
+ *           networks are most connected inside of national boundaries.
+ *     (2) However, due to larger network effects (and colonialism) the
+ *           customs tend to be the same across countries that share
+ *           a dominant /language/, and can differ inside countries
+ *           with multiple dominant languages (e.g. Canada or Belgium).
+ *     (3) Because of (2), we can't take for granted that knowing what
+ *           country a user is currently in tells us what kind of numbers
+ *           they expect to see. People move around!
+ *     (4) BUT at the same time knowing the language alone is not enough,
+ *           because of (1). Some countries which share a language use
+ *           different styles (e.g. UK and US).
+ *
+ * And so the first argument to this function is an ISO 631-1 language code
+ * with an optional ISO 3166-1 alpha-2 region code, separated by a hyphen.
+ * This tends to be the locale format reported in browsers.
+ *
+ * The bulk of the implementation is then a giant switch statement on the
+ * locale. It's not pretty, but it's the clearest way I can think of to break
+ * up the problem. This associates each locale/currency pair to a /schema/,
+ * which is a slug representing the localized format.
+ *
+ * @see https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
+ * @see https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2
+ *
+ *
+ * GLOSSARY
+ * ========
+ *
+ *   * currency symbol
+ *       This is the customary unit symbol of the currency, like '$' or '€'.
+ *       Note that these may not be unique and so may require disambiguation,
+ *       and because currencies are issued by national governments that can
+ *       depend on the geo locale. Not to be confused with three letter names
+ *       specified in ISO 4217, which are unique. Currencies with unique
+ *       symbols are AWESOME.
+ *   * major unit
+ *       All currencies have a /major unit/; this is "the" unit of the currency.
+ *       For USD it's the dollar, for EUR it's the euro, for JPY it's the yen.
+ *   * minor unit
+ *       Most currencies divide their major unit into some whole number of /minor
+ *       units/; e.g. in USD we have 1 dollar == 100 cents. For some currencies
+ *       the minor unit is no longer in use due to inflation or devaluation;
+ *       this is the case for JPY. In these cases (and JPY is the main one)
+ *       we might as well think of the minor unit as the same as the major unit.
+ *       Regardless of currency, monetary amounts are formatted as an integer
+ *       number of major units with any minor unit remainder as a decimal part.
+ *   * exponent
+ *       For most currencies the number of minor units per major unit is a
+ *       power of ten, either 100 = 10^2 or 1000 = 10^3. In these cases the
+ *       power (2 or 3) is called the /exponent/. HOWEVER note that there are
+ *       some currencies where the number of minor units per major unit is not
+ *       an integer power of 10, so working with the exponent (2 or 3) is harder
+ *       than working with the multiple directly (100 or 1000). This code uses
+ *       the multiple only.
+ *
+ *
+ * NOTES FOR MAINTAINERS
+ * =====================
+ *
+ * This package will almost certainly require tweaking on a locale-by-locale
+ * basis. It's intended that this will happen in two places:
+ *
+ *   * To adjust formatting for a specific locale and currency:
+ *       Look at currencyFormattingSchema(). This is a giant nested switch
+ *       statement that governs the format used for a given locale/currency pair.
+ *       See also the CurrencyFormat type.
+ *   * To add a new format:
+ *       Look at localizeCurrencyWithSchema(). This is where a format slug
+ *       and amount data get translated to an actual string.
+ *
+ *
+ * FURTHER READING
+ * ===============
+ *
+ * Surprisingly there are no standard documents on localized currency formatting,
+ * but the following resources are helpful:
+ *
+ *     https://publications.europa.eu/code/en/en-370303.htm
+ *     https://en.wikipedia.org/wiki/ISO_4217
+ *     https://en.wikipedia.org/wiki/Currency_symbol
+ *     https://en.wikipedia.org/wiki/Decimal_separator
+ *     https://www.thefinancials.com/Default.aspx?SubSectionID=curformat
+ *     https://www.loc.gov/standards/iso639-2/php/English_list.php
+ *
+ * @param {LocaleCode<Raw>} rawLocaleCode
+ *   ISO 631-1 language code with an optional ISO 3166-1 alpha-2 region code,
+ *   separated by a hyphen. Examples: 'en', 'en-gb', 'fr-be'.
+ * @param {CurrencyCode} currencyCode
+ *   ISO 4217 currency code. Examples: 'USD', 'JPY', 'BRL'.
+ * @param {number} amount
+ *   Integer amount in minor currency units. Examples: $1.00 USD and ¥100 JPY
+ *   are both passed as 100.
+ * @returns {string}
+ *   Localized monetary amount
+ */
+export function localizeMonetaryAmount(
+	rawLocaleCode: LocaleCode< Raw >,
+	currencyCode: CurrencyCode,
+	amount: number
+): LocalizedMonetaryAmount {
+	// Validate arguments
+	if ( ! ( typeof amount === 'number' && Number.isInteger( amount ) ) ) {
+		throw 'amount parameter must be an integer.';
+	}
+
+	const localeCode = normalizeLocaleCode( rawLocaleCode );
+
+	return localizeCurrencyWithSchema(
+		Math.sign( amount ),
+		Math.abs( amount ),
+		localeCode,
+		currencyCode,
+		currencyFormattingSchema( localeCode, currencyCode )
+	);
+}
+
+export type LocalizedMonetaryAmount = string;
+
+/**
+ * Representation of the possible currency schemas.
+ */
+enum CurrencyFormat {
+	LocalSymbol_Amount,
+	LocalSymbol_Amount_Code,
+}
+
+/**
+ * Selects a reified formatting style for the given locale and currency.
+ * This style is represented by a slug called a /schema/, and consumed by
+ * localizeCurrencyWithSchema() to construct the formatted string.
+ *
+ * @param {LocaleCode<Normalized>} localeCode
+ *   ISO 631-1 language code with an optional ISO 3166-1 alpha-2 region code,
+ *   separated by a hyphen. Examples: 'en', 'en-gb', 'fr-be'.
+ * @param {CurrencyCode} currencyCode
+ *   ISO 4217 currency code. Examples: 'USD', 'JPY', 'BRL'.
+ * @returns {CurrencyFormat}
+ *   Currency formatting schema slug
+ */
+function currencyFormattingSchema(
+	localeCode: LocaleCode< Normalized >,
+	currencyCode: CurrencyCode
+): CurrencyFormat {
+	switch ( localeCode ) {
+		case 'en-us':
+			// Most common case first
+			if ( currencyCode === 'USD' ) {
+				return CurrencyFormat.LocalSymbol_Amount;
+			}
+
+			if ( hasUniqueLocalSymbol( currencyCode ) ) {
+				return CurrencyFormat.LocalSymbol_Amount;
+			}
+
+			switch ( currencyCode ) {
+				case 'GBP':
+					return CurrencyFormat.LocalSymbol_Amount;
+
+				default:
+					return CurrencyFormat.LocalSymbol_Amount_Code;
+			}
+
+		default:
+			if ( hasUniqueLocalSymbol( currencyCode ) ) {
+				return CurrencyFormat.LocalSymbol_Amount;
+			}
+
+			switch ( currencyCode ) {
+				case 'GBP':
+					return CurrencyFormat.LocalSymbol_Amount;
+
+				// Default to generic verbose format
+				default:
+					return CurrencyFormat.LocalSymbol_Amount_Code;
+			}
+	}
+}
+
+/**
+ * Localize a monetary amount using the given schema slug.
+ *
+ * @param {number} amountSign
+ *   1, 0, or -1, to distinguish positive and negative amounts
+ * @param {number} absoluteAmount
+ *   Nonnegative integer number of minor currency units
+ * @param {LocaleCode<Normalized>} localeCode
+ *   ISO 631-1 language code with an optional ISO 3166-1 alpha-2 region code,
+ *   separated by a hyphen. Examples: 'en', 'en-gb', 'fr-be'.
+ * @param {CurrencyCode} currencyCode
+ *   ISO 4217 currency code. Examples: 'USD', 'JPY', 'BRL'.
+ * @param {CurrencyFormat} schema
+ *   A slug representing a currency format
+ * @returns {string}
+ *   Localized monetary amount
+ */
+function localizeCurrencyWithSchema(
+	amountSign: number,
+	absoluteAmount: number,
+	localeCode: LocaleCode< Normalized >,
+	currencyCode: CurrencyCode,
+	schema: CurrencyFormat
+): LocalizedMonetaryAmount {
+	const symbol = localSymbolForCurrency( localeCode, currencyCode );
+	const sign = amountSign >= 0 ? '' : '-';
+
+	switch ( schema ) {
+		// $1,000.50
+		case CurrencyFormat.LocalSymbol_Amount:
+			if ( 0 === amountSign ) {
+				return symbol.concat( '0' );
+			}
+
+			return sign.concat(
+				symbol.concat(
+					renderAmountWithSeparatorsForCurrencyAndLocale( absoluteAmount, localeCode, currencyCode )
+				)
+			);
+
+		// $1,000.50 USD
+		case CurrencyFormat.LocalSymbol_Amount_Code:
+			if ( 0 === amountSign ) {
+				return symbol
+					.concat( '0' )
+					.concat( '\u00A0' )
+					.concat( currencyCode );
+			}
+
+			return sign
+				.concat(
+					symbol.concat(
+						renderAmountWithSeparatorsForCurrencyAndLocale(
+							absoluteAmount,
+							localeCode,
+							currencyCode
+						)
+					)
+				)
+				.concat( '\u00A0'.concat( currencyCode ) );
+
+		default:
+			throw `Unrecognized currency format ${ schema }`;
+	}
+}
+
+/**
+ * Localize a nonnegative number of minimal currency units. Does not
+ * include any currency symbols.
+ *
+ * @param {number} absoluteAmount
+ *   Nonnegative integer amount in minimal currency units
+ * @param {LocaleCode<Normalized>} localeCode
+ *   ISO 631-1 language code with an optional ISO 3166-1 alpha-2 region code,
+ *   separated by a hyphen. Examples: 'en', 'en-gb', 'fr-be'.
+ * @param {CurrencyCode} currencyCode
+ *   ISO 4217 currency code. Examples: 'USD', 'JPY', 'BRL'.
+ * @returns {string} Localized amount string
+ */
+function renderAmountWithSeparatorsForCurrencyAndLocale(
+	absoluteAmount: number,
+	localeCode: LocaleCode< Normalized >,
+	currencyCode: CurrencyCode
+): string {
+	const { integerPart, fractionalPart } = digitGroupsOfAmountForCurrency(
+		localeCode,
+		currencyCode,
+		absoluteAmount
+	);
+	const { groupSeparator } = separatorsForLocale( localeCode );
+	const base = minorUnitsPerMajorUnit( currencyCode );
+
+	// Currencies with no minor unit
+	if ( 1 === base ) {
+		return integerPart.join( groupSeparator );
+	}
+
+	return integerPart.join( groupSeparator ).concat( fractionalPart );
+}
+
+/**
+ * Separate an amount into its fractional part and grouped digits of the integer part.
+ *
+ * @param {LocaleCode<Normalized>} localeCode
+ *   ISO 631-1 language code with an optional ISO 3166-1 alpha-2 region code,
+ *   separated by a hyphen. Examples: 'en', 'en-gb', 'fr-be'.
+ * @param {CurrencyCode} currencyCode
+ *   ISO 4217 currency code. Examples: 'USD', 'JPY', 'BRL'.
+ * @param {number} absoluteAmount
+ *   Positive integer amount in minimal currency units
+ * @returns {{integerPart: string[], fractionalPart: string}}
+ *   Digit groups; the integer part is sorted from most to least significant
+ */
+function digitGroupsOfAmountForCurrency(
+	localeCode: LocaleCode< Normalized >,
+	currencyCode: CurrencyCode,
+	absoluteAmount: number
+): { integerPart: string[]; fractionalPart: string } {
+	if ( ! ( Number.isInteger( absoluteAmount ) && absoluteAmount >= 0 ) ) {
+		throw 'absoluteAmount parameter must be a nonnegative integer.';
+	}
+
+	// Zero money is a special case.
+	if ( 0 === absoluteAmount ) {
+		return {
+			integerPart: [ '0' ],
+			fractionalPart: minorUnitsAsDecimalForCurrency( localeCode, currencyCode, 0 ),
+		};
+	}
+
+	const base = minorUnitsPerMajorUnit( currencyCode );
+
+	// Currencies with no minor unit are a special case.
+	if ( 1 === base ) {
+		return {
+			integerPart: groupDigits( localeCode, absoluteAmount ),
+			fractionalPart: '',
+		};
+	}
+
+	const fractionalPart = minorUnitsAsDecimalForCurrency(
+		localeCode,
+		currencyCode,
+		absoluteAmount % base
+	);
+	const majorUnitAmount = Math.floor( absoluteAmount / base );
+
+	return {
+		integerPart: groupDigits( localeCode, majorUnitAmount ),
+		fractionalPart: fractionalPart,
+	};
+}
+
+/**
+ * Computes the digit groups of an integer as an array of strings from most
+ * to least significant. This depends on the locale, as customs for grouping
+ * digits differ around the world.
+ *
+ * @examples
+ *   - US:    100,000,000
+ *   - India: 10,00,00,000
+ *
+ * @param {LocaleCode<Normalized>} localeCode
+ *   ISO 631-1 language code with an optional ISO 3166-1 alpha-2 region code,
+ *   separated by a hyphen. Examples: 'en', 'en-gb', 'fr-be'. Must be lower case.
+ * @param {number} absoluteAmount
+ *   Number to decompose; must be nonnegative
+ * @returns {string[]}
+ *   Digit groups as strings, from most to least significant
+ */
+function groupDigits( localeCode: LocaleCode< Normalized >, absoluteAmount: number ): string[] {
+	// Accumulating recursive function that splits digits into
+	// groups of a fixed size. Interior groups are zero-padded.
+	function groupDigitsAccum(
+		localAmount: number,
+		localDigits: string[],
+		numDigitsPerGroup: number
+	) {
+		const base = 10 ** numDigitsPerGroup;
+
+		if ( localAmount < base ) {
+			return [ localAmount.toString() ].concat( localDigits );
+		}
+
+		const nextGroup = localAmount % base;
+		const remaining = Math.floor( localAmount / base );
+
+		return groupDigitsAccum(
+			remaining,
+			[ nextGroup.toString().padStart( numDigitsPerGroup, '0' ) ].concat( localDigits ),
+			numDigitsPerGroup
+		);
+	}
+
+	switch ( localeCode ) {
+		// Locales with "2*3" style digit groups
+		case 'bn': // Bengali
+		case 'en-in': // English - India
+		case 'en-pk': // English - Pakistan
+		case 'hi': // Hindi
+		case 'in': // India
+		case 'my': // Burmese
+		case 'ne': // Nepali
+		case 'pk': // Pakistan
+		case 'si': // Sinhala
+		case 'ta': // Tamil
+		case 'ur': // Urdu
+			if ( absoluteAmount < 1000 ) {
+				return [ absoluteAmount.toString() ];
+			}
+
+			return groupDigitsAccum(
+				Math.floor( absoluteAmount / 1000 ),
+				[ ( absoluteAmount % 1000 ).toString().padStart( 3, '0' ) ],
+				2
+			);
+
+		// Locales with "3*" style digit groups
+		default:
+			return groupDigitsAccum( absoluteAmount, [], 3 );
+	}
+}
+
+/**
+ * Formats fractional currency units with the radix symbol.
+ *
+ * @param {LocaleCode<Normalized>} localeCode
+ *   ISO 631-1 language code with an optional ISO 3166-1 alpha-2 region code,
+ *   separated by a hyphen. Examples: 'en', 'en-gb', 'fr-be'.
+ * @param {CurrencyCode} currencyCode
+ *   ISO 4217 currency code. Examples: 'USD', 'JPY', 'BRL'.
+ * @param {number} absoluteAmount
+ *   Number of minor currency units. Must be positive, and must be in
+ *   the range [0 .. minorUnitsPerMajorUnit - 1]
+ * @returns {string}
+ *   Fractional currency string with radix symbol
+ */
+function minorUnitsAsDecimalForCurrency(
+	localeCode: LocaleCode< Normalized >,
+	currencyCode: CurrencyCode,
+	absoluteAmount: number
+): string {
+	const radixSymbol = separatorsForLocale( localeCode ).decimalSeparator;
+
+	switch ( currencyCode ) {
+		// Let's catch the common cases first
+		case 'AUD': // Australian dollar
+		case 'BRL': // Brazilian real
+		case 'CAD': // Canadian dollar
+		case 'USD': // US dollar
+			if ( absoluteAmount < 0 || 100 <= absoluteAmount ) {
+				throw 'Minor units should be between 0 and 99 inclusive';
+			}
+			if ( absoluteAmount === 0 ) {
+				return '';
+			}
+			return radixSymbol.concat( absoluteAmount.toString().padStart( 2, '0' ) );
+
+		// Currencies with no minor unit
+		case 'BIF': // Burundian franc
+		case 'CLP': // Chilean peso
+		case 'DJF': // Djibouti franc
+		case 'GNF': // Guinean franc
+		case 'ISK': // Icelandic króna
+		case 'JPY': // Yen
+		case 'KMF': // Comorian franc
+		case 'KRW': // Won
+		case 'PYG': // Guarani
+		case 'RWF': // Rwanda franc
+		case 'UGX': // Uganda shilling
+		case 'UYU': // Uruguay peso en unidades indexadas
+		case 'VUV': // Vatu
+		case 'VND': // Vietnamese dong
+		case 'XAF': // CFA Franc BEAC
+		case 'XOF': // CFA Franc BCEAO
+		case 'XPF': // CFP Franc
+			throw 'Currency does not have a minor unit: '.concat( currencyCode );
+
+		// 10000 minor units per major unit
+		case 'CLF': // Unidad de Fomento
+		case 'UYW': // Unidad Previsional
+			if ( absoluteAmount < 0 || 10000 <= absoluteAmount ) {
+				throw 'Minor units should be between 0 and 9999 inclusive';
+			}
+			if ( absoluteAmount === 0 ) {
+				return '';
+			}
+			return radixSymbol.concat( absoluteAmount.toString().padStart( 4, '0' ) );
+
+		// 1000 minor units per major unit
+		case 'BHD': // Bahraini dinar
+		case 'IQD': // Iraqi dinar
+		case 'JOD': // Jordanian dinar
+		case 'KWD': // Kuwaiti dinar
+		case 'LYD': // Libyan dinar
+		case 'OMR': // Rial Omani
+		case 'TND': // Tunisian dinar
+			if ( absoluteAmount < 0 || 1000 <= absoluteAmount ) {
+				throw 'Minor units should be between 0 and 999 inclusive';
+			}
+			if ( absoluteAmount === 0 ) {
+				return '';
+			}
+			return radixSymbol.concat( absoluteAmount.toString().padStart( 3, '0' ) );
+
+		// 5 minor units per major unit (!!!)
+		case 'MGA': // Malagasy ariary
+		case 'MRU': // Mauritanian ouguiya
+			if ( absoluteAmount < 0 || 5 <= absoluteAmount ) {
+				throw 'Minor units should be between 0 and 4 inclusive';
+			}
+			if ( absoluteAmount === 0 ) {
+				return '';
+			}
+			return radixSymbol.concat( ( absoluteAmount * 20 ).toString() );
+
+		// Otherwise assume 100 minor units per major unit
+		default:
+			if ( absoluteAmount < 0 || 100 <= absoluteAmount ) {
+				throw 'Minor units should be between 0 and 99 inclusive';
+			}
+			if ( absoluteAmount === 0 ) {
+				return '';
+			}
+			return radixSymbol.concat( absoluteAmount.toString().padStart( 2, '0' ) );
+	}
+}
+
+/**
+ * Local currency symbol as used in its issuing jurisdiction. May not be unique.
+ * Note that some symbols vary by language.
+ *
+ * @param {LocaleCode<Normalized>} localeCode
+ *   ISO 631-1 language code with an optional ISO 3166-1 alpha-2 region code,
+ *   separated by a hyphen. Examples: 'en', 'en-gb', 'fr-be'. Must be lower case.
+ * @param {CurrencyCode} currencyCode
+ *   ISO 4217 currency code. Examples: 'USD', 'JPY', 'BRL'.
+ * @returns {string} Local currency symbol. May not be unique.
+ */
+function localSymbolForCurrency(
+	localeCode: LocaleCode< Normalized >,
+	currencyCode: CurrencyCode
+): string {
+	switch ( currencyCode ) {
+		// Let's catch the most common cases early
+		case 'USD': // United States dollar
+		case 'AUD': // Australian dollar
+		case 'CAD': // Canadian dollar
+			return '$';
+
+		case 'EUR': // Euro
+			return '€';
+
+		case 'GBP': // British pound
+			return '£';
+
+		// $
+		case 'ARS': // Argentine peso
+		case 'BBD': // Barbadian dollar
+		case 'BMD': // Bermudian dollar
+		case 'BND': // Brunei dollar
+		case 'BZD': // Belize dollar
+		case 'BSD': // Bahamian dollar
+		case 'CLP': // Chilean peso
+		case 'COP': // Colombian peso
+		case 'KYD': // Cayman Islands dollar
+		case 'CUC': // Cuban convertible peso
+		case 'CUP': // Cuban peso
+		case 'CVE': // Cape Verdean escudo
+		case 'DOP': // Dominican peso
+		case 'FJD': // Fijian dollar
+		case 'GYD': // Guyanese dollar
+		case 'HKD': // Hong Kong dollar
+		case 'KID': // Kiribati dollar
+		case 'JMD': // Jamaican dollar
+		case 'LRD': // Liberian dollar
+		case 'MXN': // Mexican peso
+		case 'NAD': // Namibian dollar
+		case 'NZD': // New Zealand dollar
+		case 'SBD': // Solomon Islands dollar
+		case 'SGD': // Singapore dollar
+		case 'SRD': // Surinamese dollar
+		case 'TTD': // Trinidad and Tobago dollar
+		case 'TVD': // Tuvaluan dollar
+		case 'TWD': // New Taiwan dollar
+		case 'UYU': // Uruguayan peso
+		case 'XCD': // Eastern Caribbean dollar
+			return '$';
+
+		// kr
+		case 'DKK': // Danish krone
+		case 'ISK': // Icelandic króna
+		case 'NOK': // Norwegian krone
+		case 'SEK': // Swedish krona
+			return 'kr';
+
+		// Fr
+		case 'BIF': // Burundian franc
+		case 'CDF': // Congolese franc
+		case 'DJF': // Djiboutian franc
+		case 'GNF': // Guinean franc
+		case 'KMF': // Comorian franc
+		case 'RWF': // Rwandan franc
+		case 'XAF': // Central African CFA franc
+		case 'XOF': // West African CFA franc
+			return 'Fr';
+
+		// £
+		case 'IMP': // Manx pound (Isle of Man)
+		case 'JEP': // Jersey pound
+		case 'FKP': // Falkland Islands pound
+		case 'GGP': // Guernsey pound
+		case 'GIP': // Gibraltar pound
+		case 'SHP': // Saint Helena pound
+		case 'SSP': // South Sudanese pound
+			return '£';
+
+		// Sh
+		case 'KES': // Kenyan shilling
+		case 'SOS': // Somali shilling
+		case 'TZS': // Tanzanian shilling
+		case 'UGX': // Ugandan shilling
+			return 'Sh';
+
+		// ₨
+		case 'MUR': // Mauritian rupee
+		case 'PKR': // Pakistani rupee
+		case 'SCR': // Seychellois rupee
+			return '₨';
+
+		// ₩
+		case 'KPW': // North Korean won
+		case 'KRW': // South Korean won
+			return '₩';
+
+		// Unique currency symbols
+		case 'AED': // United Arab Emirates dirham
+			return 'د.إ';
+		case 'AFN': // Afghan afghani
+			return '؋';
+		case 'ALL': // Albanian lek
+			return 'L';
+		case 'AMD': // Armenian dram
+			return '֏';
+		case 'ANG': // Netherlands Antillean guilder
+			return 'ƒ';
+		case 'AOA': // Angolan kwanza
+			return 'Kz';
+		case 'AWG': // Aruban florin
+			return 'ƒ';
+		case 'AZN': // Azerbaihani manat
+			return '₼';
+		case 'BAM': // Bosnia and Herzegovina convertible mark
+			return 'KM';
+		case 'BDT': // Bangladeshi taka
+			return '৳ ';
+		case 'BGN': // Bulgarian lev
+			return 'лв.';
+		case 'BHD': // Bahraini dinar
+			return '.د.ب';
+		case 'BOB': // Boliviano
+			return 'Bs.';
+		case 'BRL': // Brazilian real
+			return 'R$';
+		case 'BTN': // Bhutanese ngultrum
+			return 'Nu.';
+		case 'BWP': // Botswana pula
+			return 'P';
+		case 'BYN': // Belarusian ruble
+			return 'Br';
+		case 'CHF': // Swiss franc
+			return 'Fr.';
+		case 'CNY': // Chinese yuan
+			return '元';
+		case 'CRC': // Costa Rican colón
+			return '₡';
+		case 'CZK': // Czech koruna
+			return 'Kč';
+		case 'DZD': // Algerian dinar
+			return 'د.ج';
+		case 'EGP': // Egyptian pound
+			switch ( localeCode ) {
+				case 'ar-eg':
+					return 'ج.م';
+				default:
+					return 'E£';
+			}
+		case 'ERN': // Eritrean nakfa
+			return 'Nfk';
+		case 'ETB': // Ethiopian birr
+			return 'Br';
+		case 'GEL': // Geolrian lari
+			return '₾';
+		case 'GHS': // Ghanaian cedi
+			return '₵';
+		case 'GMD': // Gambian dalasi
+			return 'D';
+		case 'GTQ': // Guatemalan quetzal
+			return 'Q';
+		case 'HNL': // Honduran lempira
+			return 'L';
+		case 'HRK': // Croatian kuna
+			return 'kn';
+		case 'HTG': // Haitian gourde
+			return 'G';
+		case 'HUF': // Hungarian forint
+			return 'Ft';
+		case 'IDR': // Indonesian rupiah
+			return 'Rp';
+		case 'ILS': // Israeli shekel
+			return '₪';
+		case 'INR': // Indian rupee
+			return '₹';
+		case 'IQD': // Iraqi dinar
+			return 'ع.د';
+		case 'IRR': // Iranian dinar
+			return '﷼';
+		case 'JOD': // Jordanian dinar
+			return 'د.ا';
+		case 'JPY': // Japanese yen
+			return '¥';
+		case 'KGS': // Kyrgyzstani som
+			return 'с';
+		case 'KHR': // Cambodian riel
+			return '៛';
+		case 'KWD': // Kuwaiti dinar
+			return 'د.ك';
+		case 'KZT': // Kazakhstani tenge
+			return '₸';
+		case 'LAK': // Lao kip
+			return '₭';
+		case 'LBP': // Lebanese pound
+			return 'ل.ل';
+		case 'LKR': // Sri Lankan rupee
+			switch ( localeCode ) {
+				case 'si': // Sinhala
+					return 'රු';
+				case 'ta': // Tamil
+					return 'ரூ';
+				default:
+					return 'Rs.';
+			}
+		case 'LSL': // Lesotho loti
+			return 'L';
+		case 'LYD': // Libyan dinar
+			return 'ل.د';
+		case 'MAD': // Moroccan dirham
+			return 'د.م.';
+		case 'MDL': // Moldovan leu
+			return 'L';
+		case 'MGA': // Malagasy ariary
+			return 'Ar';
+		case 'MKD': // Macedonian denar
+			return 'ден';
+		case 'MMK': // Burmese kyat
+			return 'Ks';
+		case 'MNT': // Mongolian tögrög
+			return '₮';
+		case 'MOP': // Macanese pataca
+			return 'P';
+		case 'MRU': // Mauritanian ouguiya
+			return 'UM';
+		case 'MVR': // Maldivian rufiyaa
+			return '.ރ';
+		case 'MWK': // Malawian kwacha
+			return 'MK';
+		case 'MYR': // Malaysian ringgit
+			return 'RM';
+		case 'MZN': // Mozambican metical
+			return 'MT';
+		case 'NGN': // Nigerian naira
+			return '₦';
+		case 'NIO': // Nicaraguan córdoba
+			return 'C$';
+		case 'NPR': // Nepalese rupee
+			return 'रू';
+		case 'OMR': // Omani rial
+			return 'ر.ع.';
+		case 'PAB': // Panamanian balboa
+			return 'B/.';
+		case 'PEN': // Perfuvian sol
+			return 'S/';
+		case 'PGK': // Papua New Guinean kina
+			return 'K';
+		case 'PHP': // Philippine peso
+			return '₱';
+		case 'PLN': // Polish złoty
+			return 'zł';
+		case 'PRB': // Transnistrian ruble
+			return 'p.';
+		case 'PYG': // Paraguayan guarani
+			return '₲';
+		case 'QAR': // Qatari riyal
+			return 'ر.ق';
+		case 'RON': // Romanian leu
+			return 'lei';
+		case 'RSD': // Serbian dinar
+			return 'дин.';
+		case 'RUB': // Russian ruble, also Pokédollar
+			return '₽';
+		case 'SAR': // Saudi riyal
+			return 'ر.س';
+		case 'SDG': // Sudanese pound
+			return 'ج.س.';
+		case 'SLL': // Sierra Leonean leone
+			return 'Le';
+		case 'SLS': // Somaliland shilling
+			return 'Sl';
+		case 'STN': // São Tomé and Príncipe dobra
+			return 'Db';
+		case 'SYP': // Syrian pound
+			return '£S';
+		case 'SZL': // Swazi lilangeni
+			return 'L';
+		case 'THB': // Thai baht
+			return '฿';
+		case 'TJS': // Tajikistani somoni
+			return 'SM';
+		case 'TMT': // Turkmenistan manat
+			return 'm';
+		case 'TND': // Tunisian dinar
+			return 'د.ت';
+		case 'TOP': // Tongan pa'anga
+			return 'T$';
+		case 'TRY': // Turkish lira
+			return '₺';
+		case 'UAH': // Ukrainian hryvnia
+			return '₴';
+		case 'UZS': // Uzbekistani so'm
+			return 'сўм';
+		case 'VES': // Venezuelan bolívar
+			return 'Bs.S.';
+		case 'VND': // Vietnamese đồng
+			return '₫';
+		case 'VUV': // Vanuatu vatu
+			return 'Vt';
+		case 'WST': // Samoan tālā
+			return 'T';
+		case 'XPF': // CFP franc
+			return '₣';
+		case 'YER': // Yemeni rial
+			return '﷼';
+		case 'ZAR': // South African rand
+			return 'R';
+		case 'ZMW': // Zambian kwacha
+			return 'ZK';
+
+		default:
+			throw `Symbol for currency code not defined: ${ currencyCode }`;
+	}
+}
+
+/**
+ * Type representing a digit separator custom.
+ *
+ *   * `decimalSeparator` is the symbol used for the radix point
+ *   * `groupSeparator` is the symbol used to demarcate digit groups
+ *
+ * @see separatorsForLocale()
+ */
+interface DigitSeparators {
+	decimalSeparator: string;
+	groupSeparator: string;
+}
+
+/**
+ * Customary radix point and group separators in a given locale. Note
+ * that we're using non-breaking spaces.
+ *
+ * @param {string} localeCode
+ *   ISO 631-1 language code with an optional ISO 3166-1 alpha-2 region code,
+ *   separated by a hyphen. Examples: 'en', 'en-gb', 'fr-be'.
+ * @returns {DigitSeparators}
+ *   Decimal and group separators
+ */
+function separatorsForLocale( localeCode: LocaleCode< Normalized > ): DigitSeparators {
+	switch ( localeCode ) {
+		// 10,000.00
+		case 'en-hk': // English - Hong Kong
+		case 'en-ie': // English - Ireland
+		case 'en-gb': // English - United Kingdom
+		case 'en-nz': // English - New Zealand
+		case 'en-us': // English - United States
+		case 'es-mx': // Spanish - Mexico
+		case 'hi': // Hindi
+		case 'he': // Hebrew
+		case 'ja': // Japanese
+		case 'ko': // Korean
+			return { decimalSeparator: '.', groupSeparator: ',' };
+
+		// 10 000.00
+		case 'en-au': // English - Australia
+		case 'en-ca': // Canada
+			return { decimalSeparator: '.', groupSeparator: '\u00A0' };
+
+		// 10 000,00
+		case 'af': // Afrikaans
+		case 'cs': // Czech
+		case 'en-za': // English - South Africa
+		case 'et': // Estonian
+		case 'fi': // Finnish
+		case 'fr': // French
+		case 'fr-be': // French - Belgium
+		case 'fr-ca': // French - Canada
+		case 'fr-ch': // French - Switzerland
+		case 'fr-lu': // French - Luxembourg
+		case 'hu': // Hungarian
+		case 'no': // Norwegian
+		case 'nb': // Norwegian (Bokmål)
+		case 'nn': // Norwegian (Nynorsk)
+			return { decimalSeparator: ',', groupSeparator: '\u00A0' };
+
+		// 10.000,00
+		case 'es-ar': // Spanish - Argentina
+		case 'de': // German
+		case 'de-at': // German - Austria
+		case 'pt-br': // Portugese - Brazil
+			return { decimalSeparator: ',', groupSeparator: '.' };
+
+		// 10.000$00
+		case 'pt-cv': // Portugese - Cape Verde
+			return { decimalSeparator: '$', groupSeparator: '.' };
+
+		// 10,000.00
+		default:
+			return { decimalSeparator: '.', groupSeparator: ',' };
+	}
+}
+
+/**
+ * Type alias for ISO 631-1 language codes with an optional
+ * ISO 3166-1 alpha-2 region code, separated by a hyphen.
+ *
+ * Note the phantom type parameter. Like the CurrencyCode type,
+ * we want to normalize locale codes to a unique representation,
+ * but unlike CurrencyCode it is not feasible to enumerate
+ * all the possible values as a sum. Instead, our code is written
+ * against the LocaleCode<Normalized> type, which can only be
+ * produced by `normalizeLocaleCode` (which should be called
+ * exactly once and not exported from this module).
+ *
+ * @examples 'en', 'en-gb', 'fr-be'
+ */
+export type LocaleCode< a > = string;
+
+export type Raw = void;
+type Normalized = void;
+
+/**
+ * Normalize a raw locale code. Do not export this.
+ *
+ * @param {LocaleCode<Raw>} rawLocaleCode
+ *     Locale code string as returned by the browser.
+ * @returns {LocaleCode<Normalized>}
+ *     Normalized locale code (all lower case).
+ */
+function normalizeLocaleCode( rawLocaleCode: LocaleCode< Raw > ): LocaleCode< Normalized > {
+	return rawLocaleCode.toLowerCase();
+}
diff --git a/packages/localize-monetary-amount/test/localize-monetary-amount.js b/packages/localize-monetary-amount/test/localize-monetary-amount.js
new file mode 100644
index 0000000000000..5f49fd8827662
--- /dev/null
+++ b/packages/localize-monetary-amount/test/localize-monetary-amount.js
@@ -0,0 +1,358 @@
+/**
+ * Internal dependencies
+ */
+import { localizeMonetaryAmount } from '../src/index';
+
+describe( 'localizeMonetaryAmount', function() {
+	describe( 'locale is en-us', function() {
+		it( 'en-us/USD, 0', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'USD', 0 ) ).toBe( '$0' );
+		} );
+		it( 'en-us/USD, 5', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'USD', 5 ) ).toBe( '$0.05' );
+		} );
+		it( 'en-us/USD, 50', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'USD', 50 ) ).toBe( '$0.50' );
+		} );
+		it( 'en-us/USD, 500', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'USD', 500 ) ).toBe( '$5' );
+		} );
+		it( 'en-us/USD, 1010', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'USD', 1010 ) ).toBe( '$10.10' );
+		} );
+		it( 'en-us/USD, 1337', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'USD', 1337 ) ).toBe( '$13.37' );
+		} );
+		it( 'en-us/USD, 5000', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'USD', 5000 ) ).toBe( '$50' );
+		} );
+		it( 'en-us/USD, 50000', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'USD', 50000 ) ).toBe( '$500' );
+		} );
+		it( 'en-us/USD, 500000', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'USD', 500000 ) ).toBe( '$5,000' );
+		} );
+		it( 'en-us/USD, 5000000', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'USD', 5000000 ) ).toBe( '$50,000' );
+		} );
+		it( 'en-us/USD, 50000000', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'USD', 50000000 ) ).toBe( '$500,000' );
+		} );
+		it( 'en-us/USD, 500000000', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'USD', 500000000 ) ).toBe( '$5,000,000' );
+		} );
+
+		it( 'en-us/USD, -500000', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'USD', -500000 ) ).toBe( '-$5,000' );
+		} );
+
+		it( 'en-us/GBP, 123456', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'GBP', 123456 ) ).toBe( '£1,234.56' );
+		} );
+		it( 'en-us/JPY, 123456', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'JPY', 123456 ) ).toBe( '¥123,456' );
+		} );
+		it( 'en-us/EUR, 123456', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'EUR', 123456 ) ).toBe( '€1,234.56' );
+		} );
+		it( 'en-us/CAD, 123456', function() {
+			expect( localizeMonetaryAmount( 'en-us', 'CAD', 123456 ) ).toBe( '$1,234.56\u00A0CAD' );
+		} );
+	} );
+
+	describe( 'locale is en-ca', function() {
+		it( 'en-ca/CAD, 0', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'CAD', 0 ) ).toBe( '$0\u00A0CAD' );
+		} );
+		it( 'en-ca/CAD, 5', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'CAD', 5 ) ).toBe( '$0.05\u00A0CAD' );
+		} );
+		it( 'en-ca/CAD, 50', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'CAD', 50 ) ).toBe( '$0.50\u00A0CAD' );
+		} );
+		it( 'en-ca/CAD, 500', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'CAD', 500 ) ).toBe( '$5\u00A0CAD' );
+		} );
+		it( 'en-ca/CAD, 1010', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'CAD', 1010 ) ).toBe( '$10.10\u00A0CAD' );
+		} );
+		it( 'en-ca/CAD, 1337', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'CAD', 1337 ) ).toBe( '$13.37\u00A0CAD' );
+		} );
+		it( 'en-ca/CAD, 5000', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'CAD', 5000 ) ).toBe( '$50\u00A0CAD' );
+		} );
+		it( 'en-ca/CAD, 50000', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'CAD', 50000 ) ).toBe( '$500\u00A0CAD' );
+		} );
+		it( 'en-ca/CAD, 500000', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'CAD', 500000 ) ).toBe( '$5\u00A0000\u00A0CAD' );
+		} );
+		it( 'en-ca/CAD, 5000000', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'CAD', 5000000 ) ).toBe( '$50\u00A0000\u00A0CAD' );
+		} );
+		it( 'en-ca/CAD, 50000000', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'CAD', 50000000 ) ).toBe( '$500\u00A0000\u00A0CAD' );
+		} );
+		it( 'en-ca/CAD, 500000000', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'CAD', 500000000 ) ).toBe(
+				'$5\u00A0000\u00A0000\u00A0CAD'
+			);
+		} );
+
+		it( 'en-ca/CAD, -500000', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'CAD', -500000 ) ).toBe( '-$5\u00A0000\u00A0CAD' );
+		} );
+
+		it( 'en-ca/GBP, 123456', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'GBP', 123456 ) ).toBe( '£1\u00A0234.56' );
+		} );
+		it( 'en-ca/JPY, 123456', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'JPY', 123456 ) ).toBe( '¥123\u00A0456' );
+		} );
+		it( 'en-ca/EUR, 123456', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'EUR', 123456 ) ).toBe( '€1\u00A0234.56' );
+		} );
+		it( 'en-ca/USD, 123456', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'USD', 123456 ) ).toBe( '$1\u00A0234.56\u00A0USD' );
+		} );
+		it( 'en-ca/AUD, 123456', function() {
+			expect( localizeMonetaryAmount( 'en-ca', 'AUD', 123456 ) ).toBe( '$1\u00A0234.56\u00A0AUD' );
+		} );
+	} );
+
+	describe( 'locale is fr-ca', function() {
+		it( 'fr-ca/CAD, 0', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'CAD', 0 ) ).toBe( '$0\u00A0CAD' );
+		} );
+		it( 'fr-ca/CAD, 5', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'CAD', 5 ) ).toBe( '$0,05\u00A0CAD' );
+		} );
+		it( 'fr-ca/CAD, 50', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'CAD', 50 ) ).toBe( '$0,50\u00A0CAD' );
+		} );
+		it( 'fr-ca/CAD, 500', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'CAD', 500 ) ).toBe( '$5\u00A0CAD' );
+		} );
+		it( 'fr-ca/CAD, 1010', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'CAD', 1010 ) ).toBe( '$10,10\u00A0CAD' );
+		} );
+		it( 'fr-ca/CAD, 1337', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'CAD', 1337 ) ).toBe( '$13,37\u00A0CAD' );
+		} );
+		it( 'fr-ca/CAD, 5000', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'CAD', 5000 ) ).toBe( '$50\u00A0CAD' );
+		} );
+		it( 'fr-ca/CAD, 50000', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'CAD', 50000 ) ).toBe( '$500\u00A0CAD' );
+		} );
+		it( 'fr-ca/CAD, 500000', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'CAD', 500000 ) ).toBe( '$5\u00A0000\u00A0CAD' );
+		} );
+		it( 'fr-ca/CAD, 5000000', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'CAD', 5000000 ) ).toBe( '$50\u00A0000\u00A0CAD' );
+		} );
+		it( 'fr-ca/CAD, 50000000', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'CAD', 50000000 ) ).toBe( '$500\u00A0000\u00A0CAD' );
+		} );
+		it( 'fr-ca/CAD, 500000000', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'CAD', 500000000 ) ).toBe(
+				'$5\u00A0000\u00A0000\u00A0CAD'
+			);
+		} );
+
+		it( 'fr-ca/CAD, -500000', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'CAD', -500000 ) ).toBe( '-$5\u00A0000\u00A0CAD' );
+		} );
+
+		it( 'fr-ca/GBP, 123456', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'GBP', 123456 ) ).toBe( '£1\u00A0234,56' );
+		} );
+		it( 'fr-ca/JPY, 123456', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'JPY', 123456 ) ).toBe( '¥123\u00A0456' );
+		} );
+		it( 'fr-ca/EUR, 123456', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'EUR', 123456 ) ).toBe( '€1\u00A0234,56' );
+		} );
+		it( 'fr-ca/USD, 123456', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'USD', 123456 ) ).toBe( '$1\u00A0234,56\u00A0USD' );
+		} );
+		it( 'fr-ca/AUD, 123456', function() {
+			expect( localizeMonetaryAmount( 'fr-ca', 'AUD', 123456 ) ).toBe( '$1\u00A0234,56\u00A0AUD' );
+		} );
+	} );
+
+	describe( 'locale is en-au', function() {
+		it( 'en-au/AUD, 0', function() {
+			expect( localizeMonetaryAmount( 'en-au', 'AUD', 0 ) ).toBe( '$0\u00A0AUD' );
+		} );
+		it( 'en-au/AUD, 5', function() {
+			expect( localizeMonetaryAmount( 'en-au', 'AUD', 5 ) ).toBe( '$0.05\u00A0AUD' );
+		} );
+		it( 'en-au/AUD, 50', function() {
+			expect( localizeMonetaryAmount( 'en-au', 'AUD', 50 ) ).toBe( '$0.50\u00A0AUD' );
+		} );
+		it( 'en-au/AUD, 500', function() {
+			expect( localizeMonetaryAmount( 'en-au', 'AUD', 500 ) ).toBe( '$5\u00A0AUD' );
+		} );
+		it( 'en-au/AUD, 5000', function() {
+			expect( localizeMonetaryAmount( 'en-au', 'AUD', 5000 ) ).toBe( '$50\u00A0AUD' );
+		} );
+		it( 'en-au/AUD, 50000', function() {
+			expect( localizeMonetaryAmount( 'en-au', 'AUD', 50000 ) ).toBe( '$500\u00A0AUD' );
+		} );
+		it( 'en-au/AUD, 500000', function() {
+			expect( localizeMonetaryAmount( 'en-au', 'AUD', 500000 ) ).toBe( '$5\u00A0000\u00A0AUD' );
+		} );
+		it( 'en-au/AUD, 5000000', function() {
+			expect( localizeMonetaryAmount( 'en-au', 'AUD', 5000000 ) ).toBe( '$50\u00A0000\u00A0AUD' );
+		} );
+		it( 'en-au/AUD, 50000000', function() {
+			expect( localizeMonetaryAmount( 'en-au', 'AUD', 50000000 ) ).toBe( '$500\u00A0000\u00A0AUD' );
+		} );
+		it( 'en-au/AUD, 500000000', function() {
+			expect( localizeMonetaryAmount( 'en-au', 'AUD', 500000000 ) ).toBe(
+				'$5\u00A0000\u00A0000\u00A0AUD'
+			);
+		} );
+
+		it( 'en-au/AUD, -500000', function() {
+			expect( localizeMonetaryAmount( 'en-au', 'AUD', -500000 ) ).toBe( '-$5\u00A0000\u00A0AUD' );
+		} );
+
+		it( 'en-au/GBP, 123456', function() {
+			expect( localizeMonetaryAmount( 'en-au', 'GBP', 123456 ) ).toBe( '£1\u00A0234.56' );
+		} );
+		it( 'en-au/JPY, 123456', function() {
+			expect( localizeMonetaryAmount( 'en-au', 'JPY', 123456 ) ).toBe( '¥123\u00A0456' );
+		} );
+		it( 'en-au/EUR, 123456', function() {
+			expect( localizeMonetaryAmount( 'en-au', 'EUR', 123456 ) ).toBe( '€1\u00A0234.56' );
+		} );
+		it( 'en-au/USD, 123456', function() {
+			expect( localizeMonetaryAmount( 'en-au', 'USD', 123456 ) ).toBe( '$1\u00A0234.56\u00A0USD' );
+		} );
+		it( 'en-au/CAD, 123456', function() {
+			expect( localizeMonetaryAmount( 'en-au', 'CAD', 123456 ) ).toBe( '$1\u00A0234.56\u00A0CAD' );
+		} );
+	} );
+
+	describe( 'locale is en-in', function() {
+		it( 'en-in/INR, 0', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'INR', 0 ) ).toBe( '₹0' );
+		} );
+		it( 'en-in/INR, 5', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'INR', 5 ) ).toBe( '₹0.05' );
+		} );
+		it( 'en-in/INR, 50', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'INR', 50 ) ).toBe( '₹0.50' );
+		} );
+		it( 'en-in/INR, 500', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'INR', 500 ) ).toBe( '₹5' );
+		} );
+		it( 'en-in/INR, 1337', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'INR', 1337 ) ).toBe( '₹13.37' );
+		} );
+		it( 'en-in/INR, 5000', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'INR', 5000 ) ).toBe( '₹50' );
+		} );
+		it( 'en-in/INR, 50000', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'INR', 50000 ) ).toBe( '₹500' );
+		} );
+		it( 'en-in/INR, 500000', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'INR', 500000 ) ).toBe( '₹5,000' );
+		} );
+		it( 'en-in/INR, 5000000', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'INR', 5000000 ) ).toBe( '₹50,000' );
+		} );
+		it( 'en-in/INR, 50000000', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'INR', 50000000 ) ).toBe( '₹5,00,000' );
+		} );
+		it( 'en-in/INR, 500000000', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'INR', 500000000 ) ).toBe( '₹50,00,000' );
+		} );
+
+		it( 'en-in/INR, -500000', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'INR', -500000 ) ).toBe( '-₹5,000' );
+		} );
+
+		it( 'en-in/GBP, 123456789', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'GBP', 123456789 ) ).toBe( '£12,34,567.89' );
+		} );
+		it( 'en-in/JPY, 123456789', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'JPY', 123456789 ) ).toBe( '¥12,34,56,789' );
+		} );
+		it( 'en-in/EUR, 123456789', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'EUR', 123456789 ) ).toBe( '€12,34,567.89' );
+		} );
+		it( 'en-in/USD, 123456789', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'USD', 123456789 ) ).toBe(
+				'$12,34,567.89\u00A0USD'
+			);
+		} );
+		it( 'en-in/CAD, 123456789', function() {
+			expect( localizeMonetaryAmount( 'en-in', 'CAD', 123456789 ) ).toBe(
+				'$12,34,567.89\u00A0CAD'
+			);
+		} );
+	} );
+
+	describe( 'locale is de', function() {
+		it( 'de/EUR, 0', function() {
+			expect( localizeMonetaryAmount( 'de', 'EUR', 0 ) ).toBe( '€0' );
+		} );
+		it( 'de/EUR, 5', function() {
+			expect( localizeMonetaryAmount( 'de', 'EUR', 5 ) ).toBe( '€0,05' );
+		} );
+		it( 'de/EUR, 50', function() {
+			expect( localizeMonetaryAmount( 'de', 'EUR', 50 ) ).toBe( '€0,50' );
+		} );
+		it( 'de/EUR, 500', function() {
+			expect( localizeMonetaryAmount( 'de', 'EUR', 500 ) ).toBe( '€5' );
+		} );
+		it( 'de/EUR, 1010', function() {
+			expect( localizeMonetaryAmount( 'de', 'EUR', 1010 ) ).toBe( '€10,10' );
+		} );
+		it( 'de/EUR, 1337', function() {
+			expect( localizeMonetaryAmount( 'de', 'EUR', 1337 ) ).toBe( '€13,37' );
+		} );
+		it( 'de/EUR, 5000', function() {
+			expect( localizeMonetaryAmount( 'de', 'EUR', 5000 ) ).toBe( '€50' );
+		} );
+		it( 'de/EUR, 50000', function() {
+			expect( localizeMonetaryAmount( 'de', 'EUR', 50000 ) ).toBe( '€500' );
+		} );
+		it( 'de/EUR, 500000', function() {
+			expect( localizeMonetaryAmount( 'de', 'EUR', 500000 ) ).toBe( '€5.000' );
+		} );
+		it( 'de/EUR, 5000000', function() {
+			expect( localizeMonetaryAmount( 'de', 'EUR', 5000000 ) ).toBe( '€50.000' );
+		} );
+		it( 'de/EUR, 50000000', function() {
+			expect( localizeMonetaryAmount( 'de', 'EUR', 50000000 ) ).toBe( '€500.000' );
+		} );
+		it( 'de/EUR, 500000000', function() {
+			expect( localizeMonetaryAmount( 'de', 'EUR', 500000000 ) ).toBe( '€5.000.000' );
+		} );
+
+		it( 'de/EUR, -500000', function() {
+			expect( localizeMonetaryAmount( 'de', 'EUR', -500000 ) ).toBe( '-€5.000' );
+		} );
+
+		it( 'de/GBP, 123456', function() {
+			expect( localizeMonetaryAmount( 'de', 'GBP', 123456 ) ).toBe( '£1.234,56' );
+		} );
+		it( 'de/JPY, 123456', function() {
+			expect( localizeMonetaryAmount( 'de', 'JPY', 123456 ) ).toBe( '¥123.456' );
+		} );
+		it( 'de/USD, 123456', function() {
+			expect( localizeMonetaryAmount( 'de', 'USD', 123456 ) ).toBe( '$1.234,56\u00A0USD' );
+		} );
+		it( 'de/AUD, 123456', function() {
+			expect( localizeMonetaryAmount( 'de', 'AUD', 123456 ) ).toBe( '$1.234,56\u00A0AUD' );
+		} );
+		it( 'de/CAD, 123456', function() {
+			expect( localizeMonetaryAmount( 'de', 'CAD', 123456 ) ).toBe( '$1.234,56\u00A0CAD' );
+		} );
+	} );
+} );