how to solve this error --> "Property i18nFile is not allowed." - internationalization

Question

errors:
Property i18nFile is not allowed
Property i18nFormat is not allowed
Property i18nLocale is not allowed
{
"$schema": "./node_modules/#angular/cli/lib/config/schema.json",
"version": 1,
"newProjectRoot": "projects",
"projects": {
"angular-boilerplate": {
"projectType": "application",
"schematics": {
"#schematics/angular:component": {
"style": "scss"
}
},
"root": "",
"sourceRoot": "src",
"prefix": "app",
"architect": {
"build": {
"builder": "#angular-devkit/build-angular:browser",
"options": {
"allowedCommonJsDependencies": ["idb"],
"outputPath": "dist/angular-boilerplate",
"index": "src/index.html",
"main": "src/main.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "tsconfig.app.json",
"aot": true,
"assets": [
"src/favicon.ico",
"src/assets",
"src/firebase-messaging-sw.js",
"src/manifest.json"
],
"styles": [
"./node_modules/#angular/material/prebuilt-themes/indigo-pink.css",
"src/styles.scss",
"node_modules/bootstrap/dist/css/bootstrap.css"
],
"scripts": [
"node_modules/jquery/dist/jquery.js",
"node_modules/bootstrap/dist/js/bootstrap.js"
]
},
"configurations": {
"en": {
"aot": true,
"i18nFile": "src/translate/messages.en.xlf",
"i18nFormat": "xlf",
"i18nLocale": "en",
"i18nMissingTranslation": "error",
"baseHref": "/en/"
},
"fr": {
"aot": true,
"i18nFile": "src/translate/messages.fr.xlf",
"i18nFormat": "xlf",
"i18nLocale": "fr",
"i18nMissingTranslation": "error",
"baseHref": "/fr/"
},
"production": {
"fileReplacements": [
{
"replace": "src/environments/environment.ts",
"with": "src/environments/environment.prod.ts"
}
],
"optimization": {
"scripts": true,
"styles": true,
"fonts": false
},
"outputHashing": "all",
"sourceMap": false,
"namedChunks": false,
"extractLicenses": true,
"vendorChunk": false,
"buildOptimizer": true,
"budgets": [
{
"type": "initial",
"maximumWarning": "2mb",
"maximumError": "5mb"
},
{
"type": "anyComponentStyle",
"maximumWarning": "6kb",
"maximumError": "10kb"
}
],
"serviceWorker": true,
"ngswConfigPath": "ngsw-config.json"
},
"development":{
"sourceMap": true,
"optimization": false,
"buildOptimizer": false,
"vendorChunk": true,
"extractLicenses": false,
"namedChunks": true
}
}
},
"serve": {
"defaultConfiguration": "development",
"builder": "#angular-devkit/build-angular:dev-server",
"options": {
"browserTarget": "angular-boilerplate:build",
"proxyConfig": "src/proxy.conf.json"
},
"configurations": {
"en": {
"browserTarget": "angular-project:build:en"
},
"fr": {
"browserTarget": "angular-project:build:fr"
},
"production": {
"browserTarget": "angular-boilerplate:build:production"
},
"development": {
"browserTarget": "angular-boilerplate:build:development"
}
}
},
"extract-i18n": {
"builder": "#angular-devkit/build-angular:extract-i18n",
"options": {
"browserTarget": "angular-boilerplate:build"
}
},
"test": {
"builder": "#angular-devkit/build-angular:karma",
"options": {
"main": "src/test.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "tsconfig.spec.json",
"karmaConfig": "karma.conf.js",
"assets": [
"src/favicon.ico",
"src/assets",
"src/firebase-messaging-sw.js",
"src/manifest.json"
],
"styles": [
"./node_modules/#angular/material/prebuilt-themes/indigo-pink.css",
"src/styles.scss"
],
"scripts": []
}
},
"lint": {
"builder": "#angular-devkit/build-angular:tslint",
"options": {
"tsConfig": [
"tsconfig.app.json",
"tsconfig.spec.json",
"e2e/tsconfig.json"
],
"exclude": [
"**/node_modules/**"
]
}
},
"e2e": {
"builder": "#angular-devkit/build-angular:protractor",
"options": {
"protractorConfig": "e2e/protractor.conf.js",
"devServerTarget": "angular-boilerplate:serve"
},
"configurations": {
"production": {
"devServerTarget": "angular-boilerplate:serve:production"
}
}
}
}
}
}
}