Make Your Theme Translatable for Drupal 8 and Drupal 9

Last updated May 19, 2020
Theming8.9.x/9.0.x

In order to ensure that all user interface strings in your application can be translated using Drupal's localization system, any text you add to templates needs to use either the t filter or the {% trans %} tag. Anyone creating themes or editing template files associated with a theme or a module should know how to use these two utilities.

In this tutorial we'll look at:

  • How to use the t filter and {% trans %} tag in a Twig template
  • The differences between the two, and how to determine which one to use
  • How to translate strings assigned to variables in preprocess functions using the PHP t() function