Stygian

例句：

1. 1. The Stygian language is a unique dialect of the Indo-European languages.
   斯特吉安语是印欧语系的一种独特方言。
2. 2.The Stygian people are known for their unique customs and traditions.
   斯特吉安人以其独特的习俗和传统而闻名。
3. 3. The Stygian language has been lost to history, leaving only fragments of its past.
   斯特吉安语已随历史而消失，只留下其过去的片段。