Changing the en.yaml for another one in rails

I managed to get a fr.yaml. I want this to be the default, an old Rails 2.2 tutorial says to add:

config.i18n.default_locale = :fr

in environment.rb

It does not work, my rails server crashes on this config line.

What is the syntax for this settin开发者_如何转开发g in Rails 3? I do not want a multi-language app, I want to use only the french settings.

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In Rails3, you add this line to application.rb

config.i18n.default_locale = :fr

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This goes in config/application.rb in rails 3.