Add comprehensive YouTube language codes arrays for transcript downloader

language_codes.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+"""Global array of all 2-letter language codes supported by YouTube"""
+
+# Complete list of 2-letter language codes supported by YouTube
+YOUTUBE_LANGUAGE_CODES = [
+    "af", "sq", "am", "ar", "hy", "az", "eu", "be", "bn", "bs", "bg", "ca", "ceb", "zh", "zh-Hant",
+    "co", "hr", "cs", "da", "nl", "en", "eo", "et", "fi", "fr", "fy", "gl", "ka", "de", "el", "gu",
+    "ht", "ha", "haw", "iw", "hi", "hmn", "hu", "is", "ig", "id", "ga", "it", "ja", "jw", "kn", "kk",
+    "km", "rw", "ko", "ku", "ky", "lo", "la", "lv", "lt", "lb", "mk", "mg", "ms", "ml", "mt", "mi",
+    "mr", "mn", "my", "ne", "no", "ny", "or", "ps", "fa", "pl", "pt", "pa", "ro", "ru", "sm", "gd",
+    "sr", "st", "sn", "sd", "si", "sk", "sl", "so", "es", "su", "sw", "sv", "tl", "tg", "ta", "tt",
+    "te", "th", "tr", "tk", "uk", "ur", "ug", "uz", "vi", "cy", "fy", "xh", "yi", "yo", "zu"
+]
+
+# Alternative: More focused list of commonly used languages for fallback
+COMMON_FALLBACK_LANGUAGES = [
+    "en", "en-US", "en-GB",  # English variants
+    "de", "fr", "es", "it", "pt",  # Major European languages
+    "ru", "ja", "ko", "zh", "zh-Hant",  # Major Asian languages
+    "ar", "hi", "bn", "pa",  # Major world languages
+    "tr", "nl", "pl", "sv", "da", "fi", "no",  # Nordic/Scandinavian
+    "cs", "sk", "hu", "ro", "bg", "hr", "sl", "pl", "lt", "lv", "et"  # Eastern European
+]
+ENGLISH_LANGUAGES = ['en', 'en-US', 'en-GB']
+# This can be used as the list of allowed fallback languages
+ALLOWED_FALLBACK_LANGUAGES = COMMON_FALLBACK_LANGUAGES
+
+if __name__ == "__main__":
+    print("YouTube Language Codes:")
+    print(f"Total codes: {len(YOUTUBE_LANGUAGE_CODES)}")
+    print("First 10:", YOUTUBE_LANGUAGE_CODES[:10])
+    print()
+    print("Common fallback languages:")
+    print(f"Total fallback codes: {len(ALLOWED_FALLBACK_LANGUAGES)}")
+    print("Fallback codes:", ALLOWED_FALLBACK_LANGUAGES)