WPML – WordPress Multilingual CMS being developed by wpml.org. WPML makes it easy to build multilingual sites and run them. It’s powerful enough for corporate sites, yet simple for blogs. WPML Multilingual CMS comes with over 40 languages. You can also add your own language variants (like Canadian French or Mexican Spanish) using WPML’s languages editor. You can arrange different language contents in the same domain (in language directories), in sub-domains or in completely different domains.