diff --git a/config/initializers/locale.rb b/config/initializers/locale.rb
index ef55314c4..eb4ed56e7 100644
--- a/config/initializers/locale.rb
+++ b/config/initializers/locale.rb
@@ -1,2 +1,8 @@
 I18n.load_path += Dir[Rails.root.join('config', 'locales', '*.{rb,yml}')]
+
+if Rails.env.development? || Rails.env.test?
+  I18n.exception_handler = lambda do |exception, locale, key, options|
+    raise "Missing translation: #{key}"
+  end
+end
  
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