import { BrowserModule } from '@angular/platform-browser'; import { LOCALE_ID, NgModule } from '@angular/core'; import { registerLocaleData } from '@angular/common'; import localeFr from '@angular/common/locales/fr'; import { AppComponent } from './app.component'; // adding this code to detect issues like https://github.com/angular/angular-cli/issues/10322 registerLocaleData(localeFr); @NgModule({ declarations: [ AppComponent ], imports: [ BrowserModule ], providers: [{ provide: LOCALE_ID, useValue: 'fr' }], bootstrap: [AppComponent] }) export class AppModule { }