If you are looking for factual information about Antarctica, this site is probably not for you, but I can recommend the Cool Antarctica website.
In fact this website is about a sort of alternate history/fictional Antarctica, with a milder climate. Much of the continent is still covered by ice, but certain parts are habitable. Some pages on the website will deal with the native languages of Antarctica, some of which belong to the Antarctic family (descended for Proto-Antarctic) and others which belong to the Austronesian family. Others will describe the cultures and histories of the various Antarctic nations.