fix: improve language docs + string parsing

testfiles/dict/gen_lang_names.js

@@ -0,0 +1,16 @@
+const fs = require("fs");
+
+const dict = JSON.parse(fs.readFileSync("dictionary.json"));
+
+const intl = new Intl.DisplayNames(["en"], { type: "language" });
+
+let langs = Object.keys(dict);
+Object.values(dict).forEach(entry => {
+  if (entry.equivalent) {
+    langs.push(...entry.equivalent);
+  }
+});
+langs.sort();
+
+const res = Object.fromEntries(langs.map((l) => [l, intl.of(l)]));
+fs.writeFileSync("lang_names.json", JSON.stringify(res, null, 2));

testfiles/dict/lang_names.json

@@ -0,0 +1,85 @@
+{
+  "af": "Afrikaans",
+  "am": "Amharic",
+  "ar": "Arabic",
+  "as": "Assamese",
+  "az": "Azerbaijani",
+  "be": "Belarusian",
+  "bg": "Bulgarian",
+  "bn": "Bangla",
+  "bs": "Bosnian",
+  "ca": "Catalan",
+  "cs": "Czech",
+  "da": "Danish",
+  "de": "German",
+  "el": "Greek",
+  "en": "English",
+  "en-GB": "British English",
+  "en-IN": "English (India)",
+  "es": "Spanish",
+  "es-419": "Latin American Spanish",
+  "es-US": "Spanish (United States)",
+  "et": "Estonian",
+  "eu": "Basque",
+  "fa": "Persian",
+  "fi": "Finnish",
+  "fil": "Filipino",
+  "fr": "French",
+  "fr-CA": "Canadian French",
+  "gl": "Galician",
+  "gu": "Gujarati",
+  "hi": "Hindi",
+  "hr": "Croatian",
+  "hu": "Hungarian",
+  "hy": "Armenian",
+  "id": "Indonesian",
+  "is": "Icelandic",
+  "it": "Italian",
+  "iw": "Hebrew",
+  "ja": "Japanese",
+  "ka": "Georgian",
+  "kk": "Kazakh",
+  "km": "Khmer",
+  "kn": "Kannada",
+  "ko": "Korean",
+  "ky": "Kyrgyz",
+  "lo": "Lao",
+  "lt": "Lithuanian",
+  "lv": "Latvian",
+  "mk": "Macedonian",
+  "ml": "Malayalam",
+  "mn": "Mongolian",
+  "mr": "Marathi",
+  "ms": "Malay",
+  "my": "Burmese",
+  "ne": "Nepali",
+  "nl": "Dutch",
+  "no": "Norwegian",
+  "or": "Odia",
+  "pa": "Punjabi",
+  "pl": "Polish",
+  "pt": "Portuguese",
+  "pt-PT": "European Portuguese",
+  "ro": "Romanian",
+  "ru": "Russian",
+  "si": "Sinhala",
+  "sk": "Slovak",
+  "sl": "Slovenian",
+  "sq": "Albanian",
+  "sr": "Serbian",
+  "sr-Latn": "Serbian (Latin)",
+  "sv": "Swedish",
+  "sw": "Swahili",
+  "ta": "Tamil",
+  "te": "Telugu",
+  "th": "Thai",
+  "tr": "Turkish",
+  "uk": "Ukrainian",
+  "ur": "Urdu",
+  "uz": "Uzbek",
+  "vi": "Vietnamese",
+  "zh-CN": "Chinese (China)",
+  "zh-HK": "Chinese (Hong Kong)",
+  "zh-TW": "Chinese (Taiwan)",
+  "zu": "Zulu"
+}