title: Missing locale data for the locale "XXX" with angular
body: <p>I currently define "<em>LOCALE_ID</em>" on "<em>en-US</em>" this way:</p>
  
  <pre><code>@NgModule({
      providers: [{ provide: LOCALE_ID, useValue: "en-US" }, ...],
      imports: [...],
      bootstrap: [...]
  })
  </code></pre>
  
  <p>and it works pretty well. However, in order to test how dates look like in French, I replaced "<em>en-US</em>" by "<em>fr-FR</em>" and then I got the error:</p>
  
  <blockquote>
    <p>Missing locale data for the locale "fr-FR".</p>
  </blockquote>
  
  <p>I did some researches and I didn't find anything related to that. Are the locale for french included in the default package? Is it a different package? Do I have to create them by myself?</p>