Translation API - PHP Twig JavaScript

PHP Class using StringTranslationTrait

StringTranslationTrait allow to get t() and formatPlural() methods

Example:

use Drupal\Core\StringTranslation\StringTranslationTrait;

use Drupal\Core\StringTranslation\TranslationInterface;

class MyClass {

  use StringTranslationTrait;

  /**

   * Constructs a MyClass object.

   * @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation

   *   The string translation service.

   */

  public function __construct(TranslationInterface $string_translation) {

    // You can skip injecting this service, the trait will fall back to \Drupal::translation()

    // but it is recommended to do so, for easier testability,

    $this->stringTranslation = $string_translation;

    $string = $this->t('Something');

  }

}

In annotation text

Examples:

@Translation("File")

@Translation("Text in context", context="Name of context")

In a Java Script (.js file)

Syntax: Drupal.t(str, args, options);

Examples:

Drupal.t('May');

Drupal.formatPlural('May');

Drupal.t('May', {}, {context: "Long month name"});

In Twig templates

Examples:

{{ 'Hello Earth.'|trans }}

{{ 'Hello Earth.'|t }}

{{ 'Hello @username.'|t({'@username': username}) }}

{% trans %}Hello {{username}}.{% endtrans %}

{% set labelText = '@action for @name'|t({'@action': actionText|default('Close')|t,'@name': nameText}) %}

Doc : https://www.drupal.org/docs/8/api/translation-api/overview