English is now Australia’s most commonly used language, but there are also still dozens of indigenous Australian languages that are native tongues for many people living Down Under. 　今では英語がオーストラリアで最も使われている言語であるが、同国では数十ある先住民言語の一つが母国語である人が多数いる。 And many indigenous Australian languages have for tens of thousands of years used sign language as well, the most famous example being that used in the Warlpiri language used in the remote central Australian desert, centering on the community of Yuendumu. 　面白いことに、この先住民言語の中、多くが何万年前から「手話」が使われている言語が多い。恐らくその最も有名な例がオーストラリア中央部砂漠地帯内イウエンドゥムで使われているワールピリ語だ。 Including the Warlpiri, these sign languages are often the result of taboo practices, where custom forbids certain members of tribes speaking to other members. The sign languages developed as…