Enabling i18n fallback for >=1.1.0

[dextertd]

HEADS UP! i18n 1.1 changed fallbacks to exclude default locale. But that may break your application.

Please check your Rails app for ‘config.i18n.fallbacks = true’. If you’re using I18n (>= 1.1.0) and Rails (< 5.2.2), this should be ‘config.i18n.fallbacks = [I18n.default_locale]’. If not, fallbacks will be broken in your app by I18n 1.1.x.

https://github.com/ruby-i18n/i18n/releases/tag/v1.1.0

Upgrading to the latest of version of slate results in my doc showing translation missing for keys which are in my en.yml but not in my zh-cn.yml. I just want to use the old behaviour of i18n and fallback when there are missing translations, but I'm not sure where I should be putting config.i18n.fallbacks = [I18n.default_locale] as described in the i18n release above. I couldn't find the original line config.i18n.fallbacks = true which should apparently be replaced.

I've been using the old version for a while but now running into issues with old dependencies, so I want to use the latest version and set its configuration to suit my needs.