📚 Docs or angular.io bug report

Description

• https://angular.io/generated/zips/i18n/i18n.zip is source code for Angular 8 not Angular 9. Please add demo for Angular 9.
• Locale data for 'en-US' cannot be found. No locale data will be included for this locale.
• Missing documentation for targets in https://angular.io/guide/i18n#merge-the-completed-translation-file-into-the-app

"projects": {
  ...
  "angular.io-example": {
    ...
    "i18n": {
      "sourceLocale": "en-US",
      "locales": {
        "fr": "src/locale/messages.fr.xlf"
      }
    }
    ...
    "targets": {
      ...
    }
  }
}

Anything else relevant?

Please add docs for loadTranslations, clearTranslations and use i18n for library in ng-packagr.