i18n-csv_translation

https://github.com/swelther/i18n-csv_translation

Ever needed to add a new locale to an existing (Rails) project with dozens of .yml files? Too afraid to give all files to the customer or translation service and hope they do not mess up the YAML format? This gem allows you to export all i18n keys and values to one CSV file. With this the values can be easily translated and later reimported into your project. The new translations are saved in a filename similar to the original one (only the locale is replaced).