Who is your audience? If you are trying to sell a cleaning service it is probably local. If your site is a personal interest blog the world is your target. Some interesting tools have evolved to support a world stage.

A favorite WordPress plugin I used is called WordPress Global Translator Plugin.

http://www.nothing2hide.net/wp-plugins/wordpress-global-translator-plugin/

You can see this plugin in action on this site. Just click on the flag to view the site in that language. The installation is trivial and configuring simple.

There are some interesting issues with bots attempting to scan your site in another language. I found the FreeTranslator setting worked best for me.