A really simple to use plugin which provides support for additional languages for your pages and posts. Does not work with custom post types and some themes.
Adds title and content edit boxes for each additional language on edit pages for posts and pages. Translation indicator available for post list on admin panel (can be turned off).
Includes widget and shortcode to generate language selection.
When a language is selected, displays all pages, posts and menus based on selected language. Different actions for untranslated content available in the settings.

A Simple Multilanguage Plugin

Multilanguage support for pages and posts. Displays content based on selected language. Includes widget and shortcode for language selection.

A Simple Multilanguage Plugin vs Translate WordPress with GTranslate