The locale module allows you to present your Drupal site in a language other than the default English. You can use it to set up a multi-lingual web site or replace given <em>built-in</em> text with text which has been customized for your site. Whenever the locale module encounters text which needs to be displayed, it tries to translate it into the currently selected language. If a translation is not available, then the string is remembered, so you can look up untranslated strings easily.