This module generates a block containing images of country flags. Users can click these to take them to the Google Translate version of the page.
Google Translate will access your pages as an anonymous user, so this module will run some tests to determine whether to show the block. There's no use in showing the block if Google cannot reach the page, and therefore, some pages will not show the block.
Configuration of which languages to offer is done via the file system - refer to the documentation for details.