Multilanguage Web Site

What;s the best for me to use in my multilingual site.

I want a site with 3 languages same content 3 languages.

Thanks

Check out the "Babel" Extra.

Some Links:
http://rtfm.modx.com/display/ADDON/Babel
http://www.butter.com.hk/blog/posts/2010/08/internationalization-in-modx-revolution.html
or (another, more SEO friendly solution):
http://www.multilingual-modx.com/blog/2011/seo-friendly-multilingual-websites-with-modx-and-babel.html

Good luck!