MODEL:

class Book < ActiveRecord::Base
  translates :label
end

MIGRATION:
class CreateBooks < ActiveRecord::Migration
  def self.up
    create_table :books do |t|
      t.string :name
    end
    Book.create_translation_table! :name => :string
end
...

I18n.locale = :en
book = Book.new
book.name "Hello"
book.save!

I18n.locale = :pl
book.name "Witaj"
book.save!

What's in the books table? THE LAST SAVED VALUE! :(

So, every new added translation will overwrite original table values.

Is it a bug or a feature?