Drupal offers great multilanguage possibilities for your website. Drupal core already offers a way to translate the website interface AND your content (nodes) in multiple languages. Enabling multiple languages is a piece of cake and translating content is made very simple. However, you need to perform some extra tricks to get the full interface translated. For example: you might want to translate your taxonomy terms and your menu items as well. Or, also very common, using some blocks or menu-items just for a single language only.