Claim: Surkh Kotal (also called Chashma-i Shir or Sar-i Chashma) s an ancient archaeological site located in the southern part of the region of Bactria and an ancient name for the site has been put forward by W. B. Henning and J. D. M. Derrett who proposed that this language is likely to be the local Iranian dialect.
Evidence: Surkh Kotal (Persian: سرخ‌کوتل‎; Pashto: سور کوتل‎), also called Chashma-i Shir or Sar-i Chashma, is an ancient archaeological site located in the southern part of the region of Bactria, about 18 km north of the city of Puli Khumri, the capital of Baghlan Province of Afghanistan. An ancient name for the site has been put forward by W. B. Henning and J. D. M. Derrett based on a word in fragments of text found in situ that reads "ΒΑΓΟΛΑΓΓΟ" - "BAGOLANGO" - which would fit with the current name for the nearby city and its region, Baghlan. Though the script of the text is Greek, the language is unknown, so it is not known with certainty whether this word is in fact the name of the site or merely another word for something else. They propose that this language is likely to be the local Iranian dialect, and compare the word with the Old Iranian baga-danaka, meaning "temple/sanctuary".