i18ncsv.rb

require "json"
require "csv"

@rows = []

def row(val, key)
  val.each do |k, next_val|
    next_key = [key, k].join(".")
    if Hash === next_val
      row(next_val, next_key)
    else
      @rows << [next_key, next_val]
    end
  end
end

row(JSON.parse(STDIN.read), "")

csv = CSV.generate(col_sep: "\t") {|csv| @rows.each {|r| csv << r } }
File.write("ja.csv", ("\uFEFF" + csv).encode(Encoding::UTF_16LE))