Rails Translation Checker is a Chrome extension that focuses on detecting failed translations within Rails-rendered webpages using Rails i18n locales. The extension provides a convenient way to identify translation issues by displaying a count on a mini icon for each failed translation. Users can click on the icon to view detailed information about the failed translation text and its corresponding path. Additionally, there is a highlight button that, when clicked, adds a small red border to the failed text for easier identification.

This tool is a valuable asset for developers working with Rails applications, as it streamlines the process of identifying and addressing translation errors within web content.