```ruby
require 'rails_i18n_updater/config'

module RailsI18nUpdater

  # Prepare load path: add Rails core locales to I18n.load_path
  # - only add locales that are actually used in the application
  # - prepend locales so that they can be overwritten by the application
  def self.prepare_i18n_load_path
    used_locales = I18n.load_path.map { |f| File.basename(f).gsub(/\.(rb|yml)$/, '') }.uniq
    files_to_add = Dir[File.join(RailsI18nUpdater::Config.local_path, '**', "{#{used_locales.join(',')}}.{rb,yml}")]
    I18n.load_path.unshift(*files_to_add)
  end
end

# Prepare new load path in after_initialize as the I18n.load_path might
# be modified in Rails initializers.
class Rails::Initializer
  def after_initialize_with_rails_locales
    after_initialize_without_rails_locales
    RailsI18nUpdater.prepare_i18n_load_path
  end
  alias_method_chain :after_initialize, :rails_locales
end
```

Use an after_initialize configuration block instead of redefining a Rails method
user
```ruby
require 'rails_i18n_updater/config'

module RailsI18nUpdater

  # Prepare load path: add Rails core locales to I18n.load_path
  # - only add locales that are actually used in the application
  # - prepend locales so that they can be overwritten by the application
  def self.prepare_i18n_load_path
    used_locales = I18n.load_path.map { |f| File.basename(f).gsub(/\.(rb|yml)$/, '') }.uniq
    files_to_add = Dir[File.join(RailsI18nUpdater::Config.local_path, '**', "{#{used_locales.join(',')}}.{rb,yml}")]
    I18n.load_path.unshift(*files_to_add)
  end
end

# Prepare new load path in after_initialize as the I18n.load_path might
# be modified in Rails initializers.
Rails.configuration.after_initialize do
  RailsI18nUpdater.prepare_i18n_load_path
end
end
```
assistant