Projectionist

If you’re riding the development version of Rails, you can customize the inflector to create or override pluralization rules in environment.rb.

Inflector.inflections do |inflect|
  inflect.plural /^(ox)$/i, '1en'
  inflect.singular /^(ox)en/i, '1'
  inflect.irregular 'person', 'people'
  inflect.uncountable %w( fish sheep )
end

Note that the inflection rules are frozen now in Rails trunk, so this is the way to bend them to your needs.