Polyglot is an ExpressionEngine add-on that enables developers to create sites for multiple languages and locales. It helps you manage the translation of your templates, localize date, time, number and currency formats.

Polyglot allows you to:

• Set up a language variable on a single instance of ExpressionEngine
• Attriubte that language value dynamically using a rule, such as first segment (e.g. site.com/espanol ) or sub-domain (e.g. en.site.com)
• Move text out of the templates and into language files (glossaries)
• Load text appropriate for a given language
• Present dates and numbers in the appropriate format for a given language
• Keep these settings and translations stored in files for easier version-controlling, using a system like Git or SVN, and easier sharing

Find out more at Polyglot's Wiki page on GitHub.