koppen/i18n_missing_keys — pull request #6 by agordillo (2014-09-14 13:43:55+00:00)
Title: Detect missing keys when i18n fallbacks are enabled

It seems that we can pass :fallback => 'false' on the I18n.translate calls, but this is not part of the public API.
This way, its possible to detect the missing keys even when i18n fallbacks are enabled.

Hope it helps.