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This example uses the I18nPlugin in combination with the multi-compiler feature.

The webpack.config.js exports an array of all config combinations that should be compiled. In this example two different parameters for the I18nPlugin are used.

The I18nPlugin replaces every occurrence of the i18n function __(...) with a const string. i. e. __("Hello World") with "Hello World" resp. "Hallo Welt".

example.js

console.log(__("Hello World"));
console.log(__("Missing Text"));

webpack.config.js

var path = require("path");
var I18nPlugin = require("i18n-webpack-plugin");
var languages = {
	"en": null,
	"de": require("./de.json")
};
module.exports = Object.keys(languages).map(function(language) {
	return {
		name: language,
		mode: "production",
		entry: "./example",
		output: {
			path: path.join(__dirname, "js"),
			filename: language + ".output.js"
		},
		plugins: [
			new I18nPlugin(
				languages[language]
			)
		]
	};
});

de.json

{
	"Hello World": "Hallo Welt"
}

js/de.output.js

/******/ (function(modules) { /* webpackBootstrap */ })

/******/ (function(modules) { // webpackBootstrap
/******/ 	// The module cache
/******/ 	var installedModules = {};
/******/
/******/ 	// The require function
/******/ 	function __webpack_require__(moduleId) {
/******/
/******/ 		// Check if module is in cache
/******/ 		if(installedModules[moduleId]) {
/******/ 			return installedModules[moduleId].exports;
/******/ 		}
/******/ 		// Create a new module (and put it into the cache)
/******/ 		var module = installedModules[moduleId] = {
/******/ 			i: moduleId,
/******/ 			l: false,
/******/ 			exports: {}
/******/ 		};
/******/
/******/ 		// Execute the module function
/******/ 		modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
/******/
/******/ 		// Flag the module as loaded
/******/ 		module.l = true;
/******/
/******/ 		// Return the exports of the module
/******/ 		return module.exports;
/******/ 	}
/******/
/******/
/******/ 	// expose the modules object (__webpack_modules__)
/******/ 	__webpack_require__.m = modules;
/******/
/******/ 	// expose the module cache
/******/ 	__webpack_require__.c = installedModules;
/******/
/******/ 	// define getter function for harmony exports
/******/ 	__webpack_require__.d = function(exports, name, getter) {
/******/ 		if(!__webpack_require__.o(exports, name)) {
/******/ 			Object.defineProperty(exports, name, {
/******/ 				configurable: false,
/******/ 				enumerable: true,
/******/ 				get: getter
/******/ 			});
/******/ 		}
/******/ 	};
/******/
/******/ 	// define __esModule on exports
/******/ 	__webpack_require__.r = function(exports) {
/******/ 		Object.defineProperty(exports, '__esModule', { value: true });
/******/ 	};
/******/
/******/ 	// getDefaultExport function for compatibility with non-harmony modules
/******/ 	__webpack_require__.n = function(module) {
/******/ 		var getter = module && module.__esModule ?
/******/ 			function getDefault() { return module['default']; } :
/******/ 			function getModuleExports() { return module; };
/******/ 		__webpack_require__.d(getter, 'a', getter);
/******/ 		return getter;
/******/ 	};
/******/
/******/ 	// Object.prototype.hasOwnProperty.call
/******/ 	__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
/******/
/******/ 	// __webpack_public_path__
/******/ 	__webpack_require__.p = "js/";
/******/
/******/ 	// Load entry module and return exports
/******/ 	return __webpack_require__(__webpack_require__.s = 0);
/******/ })
/************************************************************************/

/******/ ([
/* 0 */
/*!********************!*\
  !*** ./example.js ***!
  \********************/
/*! no static exports found */
/*! all exports used */
/*! ModuleConcatenation bailout: Module is not an ECMAScript module */
/***/ (function(module, exports, __webpack_require__) {

console.log("Hallo Welt");
console.log("Missing Text");

/***/ })
/******/ ]);

js/en.output.js

/******/ (function(modules) { // webpackBootstrap
/******/ 	// The module cache
/******/ 	var installedModules = {};
/******/
/******/ 	// The require function
/******/ 	function __webpack_require__(moduleId) {
/******/
/******/ 		// Check if module is in cache
/******/ 		if(installedModules[moduleId]) {
/******/ 			return installedModules[moduleId].exports;
/******/ 		}
/******/ 		// Create a new module (and put it into the cache)
/******/ 		var module = installedModules[moduleId] = {
/******/ 			i: moduleId,
/******/ 			l: false,
/******/ 			exports: {}
/******/ 		};
/******/
/******/ 		// Execute the module function
/******/ 		modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
/******/
/******/ 		// Flag the module as loaded
/******/ 		module.l = true;
/******/
/******/ 		// Return the exports of the module
/******/ 		return module.exports;
/******/ 	}
/******/
/******/
/******/ 	// expose the modules object (__webpack_modules__)
/******/ 	__webpack_require__.m = modules;
/******/
/******/ 	// expose the module cache
/******/ 	__webpack_require__.c = installedModules;
/******/
/******/ 	// define getter function for harmony exports
/******/ 	__webpack_require__.d = function(exports, name, getter) {
/******/ 		if(!__webpack_require__.o(exports, name)) {
/******/ 			Object.defineProperty(exports, name, {
/******/ 				configurable: false,
/******/ 				enumerable: true,
/******/ 				get: getter
/******/ 			});
/******/ 		}
/******/ 	};
/******/
/******/ 	// define __esModule on exports
/******/ 	__webpack_require__.r = function(exports) {
/******/ 		Object.defineProperty(exports, '__esModule', { value: true });
/******/ 	};
/******/
/******/ 	// getDefaultExport function for compatibility with non-harmony modules
/******/ 	__webpack_require__.n = function(module) {
/******/ 		var getter = module && module.__esModule ?
/******/ 			function getDefault() { return module['default']; } :
/******/ 			function getModuleExports() { return module; };
/******/ 		__webpack_require__.d(getter, 'a', getter);
/******/ 		return getter;
/******/ 	};
/******/
/******/ 	// Object.prototype.hasOwnProperty.call
/******/ 	__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
/******/
/******/ 	// __webpack_public_path__
/******/ 	__webpack_require__.p = "js/";
/******/
/******/ 	// Load entry module and return exports
/******/ 	return __webpack_require__(__webpack_require__.s = 0);
/******/ })
/************************************************************************/
/******/ ([
/* 0 */
/*!********************!*\
  !*** ./example.js ***!
  \********************/
/*! no static exports found */
/*! all exports used */
/*! ModuleConcatenation bailout: Module is not an ECMAScript module */
/***/ (function(module, exports, __webpack_require__) {

console.log("Hello World");
console.log("Missing Text");

/***/ })
/******/ ]);

Info

Uncompressed

Hash: 8a5f1b2749a468f6c191a24548b478fddc0ef618
Version: webpack next
Child en:
    Hash: 8a5f1b2749a468f6c191
           Asset      Size  Chunks             Chunk Names
    en.output.js  2.88 KiB       0  [emitted]  main
    Entrypoint main = en.output.js
    chunk    {0} en.output.js (main) 65 bytes [entry] [rendered]
        > main [0] ./example.js 
        [0] ./example.js 65 bytes {0} [built]
            single entry ./example  main
Child de:
    Hash: a24548b478fddc0ef618
           Asset      Size  Chunks             Chunk Names
    de.output.js  2.88 KiB       0  [emitted]  main
    Entrypoint main = de.output.js
    chunk    {0} de.output.js (main) 65 bytes [entry] [rendered]
        > main [0] ./example.js 
        [0] ./example.js 65 bytes {0} [built] [1 warning]
            single entry ./example  main
    
    WARNING in ./example.js
    Missing localization: Missing Text

Minimized (uglify-js, no zip)

Hash: 8a5f1b2749a468f6c191a24548b478fddc0ef618
Version: webpack next
Child en:
    Hash: 8a5f1b2749a468f6c191
           Asset       Size  Chunks             Chunk Names
    en.output.js  604 bytes       0  [emitted]  main
    Entrypoint main = en.output.js
    chunk    {0} en.output.js (main) 65 bytes [entry] [rendered]
        > main [0] ./example.js 
        [0] ./example.js 65 bytes {0} [built]
            single entry ./example  main
Child de:
    Hash: a24548b478fddc0ef618
           Asset       Size  Chunks             Chunk Names
    de.output.js  603 bytes       0  [emitted]  main
    Entrypoint main = de.output.js
    chunk    {0} de.output.js (main) 65 bytes [entry] [rendered]
        > main [0] ./example.js 
        [0] ./example.js 65 bytes {0} [built] [1 warning]
            single entry ./example  main
    
    WARNING in ./example.js
    Missing localization: Missing Text

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