Possibly https://en.wikipedia.org/wiki/Indian_numbering_system (”30,000,000 (thirty million) rupees is referred to as "3 crore rupees", which is written as 3,00,00,000 rupees with commas at the thousand, lakh, and crore places”), but the writer seems a native Spanish speaker to me. Maybe the site has an editor from India?
"The Plague of Justinian, an epidemic that afflicted the Eastern Roman Empire, claimed nearly 10,00,00,000 lives. It was the worst epidemic in history, followed by the Black Plague."