WordPress is the de-facto standard blogging engine and is often used to build full websites. Its power lies in its simplicity, allowing authors to start building their websites in minutes. However, WordPress is still missing some basic features keeping it from becoming a full fledged CMS. SitePress tries to close that gap.
SitePress is an ambitious mega-plugin for WordPress. It intends to turn WP into a reasonably featured content management system. SitePress contributes exactly where WordPress is short:
- Multilingual content management
- Site-wide navigational elements
- Robust internal links
SitePress isn't going to turn WordPress into a web application frameworks. You're still not going to build your next CRM with it. However, for building complex websites which are comprised mainly of pages and posts, WordPress with SitePress work just fine.
Multilingual support for WordPress
Most of SitePress' strengths come its roots. Its design is inspired by Drupal's architecture, with the jewel crown being its multilingual support. SitePress' Multilingual support boasts similar functionality as Drupal's i18n, but without any of its complexity.

A single screen lets users configure a fully functional multilingual system. It allows selecting active languages for the website, language negotiation (language directories or independent language domains) and theme localization. A language switcher can also be added to the theme, as a widget.
Just like Drupal's i18n module, SitePress keeps different languages in different pages and posts. Each page has its own language and different related pages are linked together via "translation groups".