SAN FRANCISCO – Google on Wednesday released free software that lets website operators automatically translate online pages into any of 51 languages.

A "translator gadget" powered by Google Translate offers to transform pages for visitors if the language settings in their browsers are different from the language of a particular website, according to Google product manager Jeff Chin.

"Automatic translation is convenient and helps people get a quick gist of the page," Chin said in a blog post.

"However, it's not a perfect substitute for the art of professional translation."

In August the Internet giant added automatic translation to Google Docs allowing users to translate documents into 42 languages.

The "Tools" menu on Google Docs now includes a "Translate Document" feature which provides a list of the various languages offered, which run from Albanian to Icelandic to Vietnamese.

The Mountain View, California-based company has already built automatic translation features into its popular email program Gmail and into services such as its blog reader.