i18n-tasks
Manage translation and localization with static analysis, for Ruby i18
...Thus addressing the two main problems of i18n gem design, missing keys only blow up at runtime. i18n-tasks can be used with any project using the ruby i18n gem (default in Rails). i18n-tasks health checks if any keys are missing or not used, that interpolations variables are consistent across locales, and that all the locale files are normalized (auto-formatted).