migration.rb

[
 ["a", "fr-FR", "xxx"],
 ["b", "fr-FR", "yyy"],
 ["c", "fr-FR", "zzz"],

 ["a", "en-US", "aaa"],
 ["b", "en-US", "bbb"],
 ["c", "en-US", "ccc"]
].each do |row|
  Category.create! :code=>row.first, :language=>row.second, :name=>row.third
end