```
rspec --seed 52075 spec/models/site_spec.rb spec/lib/freedom_patches/translate_accelerator_spec.rb

Randomized with seed 52075
....................................................F

Failures:

  1) translate accelerator plugins loads plural rules from plugins
     Failure/Error: self.locale_no_cache = value

     I18n::InvalidLocale:
       :foo is not a valid locale
     # ./lib/freedom_patches/translate_accelerator.rb:254:in 'I18n.locale='
     # ./spec/lib/freedom_patches/translate_accelerator_spec.rb:118:in 'block (3 levels) in <main>'
```

This is because setting `I18n.config.available_locales` is equivalent to hard coding the
locales for the entire process. It should not be set so that `I18n` will
fallback to `backend.locales`.