input: Write a python function to select a language choice and return its corresponding language code.
  assert select_language("English") == "en"
  assert select_language("French") == "fr"
  assert select_language("German") == "de"
  assert select_language("Spanish") == "es"
  assert select_language("Japanese") == "ja"
  assert select_language("Chinese") == "zh-CN"
  assert select_language("Italian") == "it"
  assert select_language("Arabic") == "ar"
  assert select_language("Russian") == "ru"
output: def select_language(language):
      language_codes = {
          "English": "en",
          "French": "fr",
          "German": "de",
          "Spanish": "es",
          "Japanese": "ja",
          "Chinese": "zh-CN",
          "Italian": "it",
          "Arabic": "ar",
          "Russian": "ru"
      }
      return language_codes.get(language)