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Angular Internationalization (i18n)

New Transloco approach:

Summary:

Migrate from ngx-translate to Transloco script:

ng g @ngneat/transloco:migrate

Links:

Popular ngx-translate approach:

Summary:

Official Angular i18n approach:

Summary:

  • Complex to setup: separate build per every language in production
  • Complex in development: separate local server instance per every language
  • Run command to extract language strings

Run CLI command:

ng add @angular/localize

Add i18n attr:

<h1 i18n="@@introHeader">
  Hello i18n!
</h1>

<ng-container i18n="@@introDesc">I don't output any element</ng-container>

Run this CLI command to extract the source language file:

ng extract-i18n --output-path src/locale

Copy file src/locale/messages.xlf into src/locale/messages.fr.xlf.
Also add "target" for every "source" with French translation inside messages.fr.xlf:

<source>Homepage</source>
<target>Page d'accueil</target>

Angular.json update:

  "projects": {
    "project-name": {
      "i18n": {
        "sourceLocale": "en",
        "locales": {
          "fr": {
            "translation": "src/locale/messages.fr.xlf",
            "baseHref": ""
          }
        }
      },
      "architect": {
        "build": {
          "options": {
            "localize": true,
            "aot": true,
          },
          "configurations": {
            "production": {},
            "en": {
              "localize": ["en"],
              "main": "src/main.ts"
            },
            "fr": {
              "localize": ["fr"],
              "main": "src/main.ts"
            }
          }
        },
        "serve": {
          "builder": "@angular-devkit/build-angular:dev-server",
          "options": {
            "browserTarget": "project-name:build"
          },
          "configurations": {
            "production": {
              "browserTarget": "project-name:build:production"
            },
            "en": {
              "browserTarget": "project-name:build:en"
            },
            "fr": {
              "browserTarget": "project-name:build:fr"
            }
          }
        },
      }
    }
  }

Serve English localized page locally via http://localhost:420/:

ng serve --configuration=en

Serve French localized page locally via http://localhost:4201/:

ng serve --configuration=fr --port 4201

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