Levelup/supportive

Supportive exercise
I would be getting the following deprecation warnings:

[deprecated] I18n.enforce_available_locales will default to true in the future. If you really want to skip validation of your locale you can set I18n.enforce_available_locales = false to avoid this message.

This link from Stackoverflow http://stackoverflow.com/questions/20361428/rails-i18n-validation-deprecation-warning/20381730#20381730 gives a nice short answer, and a long answer as well as a link to the commit in I18n that caused the deprecation warning.