pidgin/nest

Fix some capitalization and add some extra text to the contributing index page.
[
"Afrikaans",
"Albanian",
"American English",
"Amharic",
"Arabic",
"Armenian",
"Australian English",
"Azerbaijani",
"Belarusian Latin",
"Bengali",
"Bokmal Norwegian",
"Bosnian",
"British English",
"Bulgarian",
"Canadian English",
"Catalan",
"Chinese",
"Czech",
"Danish",
"Dutch",
"Dzongkha",
"English",
"Esperanto",
"Estonian",
"Euskera (Basque)",
"Finnish",
"French",
"Galician",
"Georgian",
"German",
"Greek",
"Gujarati",
"Hebrew",
"Hindi",
"Hong Kong Chinese",
"Hungarian",
"Indonesian",
"Irish",
"Italian",
"Japanese",
"Kannada",
"Khmer",
"Korean",
"Kurdish",
"Lao",
"Lithuanian",
"Macedonian",
"Malay",
"Marathi",
"Mongolian",
"Myanmar (Burmese)",
"Nepali",
"Norwegian Nynorsk",
"Occitan",
"Oriya",
"Pashto",
"Persian",
"Polish",
"Portuguese",
"Portuguese-Brazil",
"Punjabi",
"Romanian",
"Russian",
"Serbian",
"Serbian Latin",
"Simplified Chinese",
"Sinhala",
"Slovak",
"Slovenian",
"Spanish",
"Swahili",
"Swedish",
"Tamil",
"Telugu",
"Thai",
"Traditional Chinese",
"Turkish",
"Ukranian",
"Urdu",
"Valencian-Catalan",
"Vietnamese",
"Xhosa"
]