advanced01.rb

# ! /usr/bin/ruby
# -*- encoding: utf-8 -*-
#
#	advanced01.rb
#
#						Nov/26/2020
# ---------------------------------------------------------------------
require "google/cloud/translate"

project_id    = "project-translation"
text          = "Es war einmal ein kleines Mädchen."
target_language = "ja"
location_id = "global"

contents = [text]

client = Google::Cloud::Translate.translation_service

parent = client.location_path project: project_id, location: location_id

response = client.translate_text parent:               parent,
                                 contents:             contents,
                                 target_language_code: target_language

#
response.translations.each do |translation|
	puts "Translated text: #{translation.translated_text}"
end
#
# ---------------------------------------------------------------------

実行方法

export GOOGLE_APPLICATION_CREDENTIALS=./***.json
#
./advanced01.rb

実行結果

Translated text: 昔々、小さな女の子がいました。