The interface translation module provides a method to translate strings found in the Drupal user interface. Harnessing the Language module, interface translations are automatically downloaded from the Drupal translation server. By default, the interface language is loaded through the language code as a path prefix. With the default Language configuration, paths will be prefixed with the default language.
Interface translations are based on strings provided in the code that are passed through the internal translation functions.
In this recipe, we will enable Spanish, import the language files, and review the translated interface strings to provide missing or custom translations.