Yes, the original constitution was drafted in English and the full official text of the Constitution in English, available here: https://www.india.gov.in/my-government/constitution-india/co...

However, Amendment 58 (https://github.com/prince-mishra/the-constitution-of-india/c...) made sure Hindi translations exist Hindi version here: https://www.india.gov.in/hi/my-government/constitution-india...

I am not sure about authoritative versions in any other language.