old_contents: LANGUAGE_NAMES = {
      "af":  "Afrikaans",
      "ar":  "Arabic",
      "be":  "Belarusian",
      "bg":  "Bulgarian",
      "ca":  "Catalan",
      "chr": "Cherokee",
      "cs":  "Czech",
      "cy":  "Welsh",
      "da":  "Danish",
      "de":  "German",
      "dv":  "Dhivehi",
      "el":  "Greek",
      "en":  "English",
      "es":  "Spanish",
      "et":  "Estonian",
      "fa":  "Persian",
      "fi":  "Finnish",
      "fil": "Tagalog",
      "fr":  "French",
      "ga":  "Irish",
      "gu":  "Gujarati",
      "he":  "Hebrew",
      "hi":  "Hindi",
      "hr":  "Croatian",
      "hu":  "Hungarian",
      "hy":  "Armenian",
      "is":  "Icelandic",
      "it":  "Italian",
      "iu":  "Inuktitut",
      "ja":  "Japanese",
      "ka":  "Georgian",
      "km":  "Khmer",
      "kn":  "Kannada",
      "ko":  "Korean",
      "lo":  "Laothian",
      "lt":  "Lithuanian",
      "lv":  "Latvian",
      "mk":  "Macedonian",
      "ml":  "Malayalam",
      "ms":  "Malay",
      "nb":  "Norwegian",
      "nl":  "Dutch",
      "or":  "Oriya",
      "pa":  "Punjabi",
      "pl":  "Polish",
      "pt":  "Portuguese",
      "ro":  "Romanian",
      "ru":  "Russian",
      "si":  "Sinhalese",
      "sk":  "Slovak",
      "sl":  "Slovenian",
      "sr":  "Serbian",
      "sv":  "Swedish",
      "sw":  "Swahili",
      "syr": "Syriac",
      "ta":  "Tamil",
      "te":  "Telugu",
      "th":  "Thai",
      "tr":  "Turkish",
      "uk":  "Ukrainian",
      "vi":  "Vietnamese",
      "yi":  "Yiddish",
      "zh":  "Chinese",
      "zh-TW":   "Chineset"
  }
  
new_contents: LANGUAGE_NAMES = {
      "de":  "German",
      "en":  "English",
      "es":  "Spanish",
      "fr":  "French",
      "nb":  "Norwegian",
      "ru":  "Russian",
  }
  
subject: Delete unused languages