Documentation Level: 
Introduction
Documentation Status: 
No known problems

Multilingual support is provided by the Locale core module.

Add a language

  1. Enable the Locale module
  2. Go to the language configuration page: Configuration > Regional and language > Languages
    (admin/config/regional/language)
  3. On that page:
    1. Add the languages you want
    2. Set a default language.
      Never change the default language, otherwise things will break!
  4. Continue with the Automatic or Manual method below to update your strings

Update strings (automatic method)

  1. Install the Localization update (l10n_update) module (optional).
  2. Update the translations for your languages: Configuration > Regional and language > Translate Interface > Update
    (admin/config/regional/translate/update)

Update strings (manual method)

  1. Download the translation files you want from translation server.
  2. Upload the translation files to your site: Configuration > Regional and language > Translate Interface > Import
    (admin/config/regional/translate/import)