Quick Reply: The English RTI Act text on IndiaCode is binding; Hindi comes from DoPT and the CIC; state-language versions sit on each SIC portal.
The binding text of the Right to Information Act, 2005 is the English original as published on IndiaCode. Hindi is the authoritative official-language text, and translations in the other scheduled languages are published by the state information commissions and DoPT as accessibility aids. This page lists where to find each version from authoritative sources.
The Act has also been translated into Malayalam, Odia, Assamese, Manipuri, Konkani, Kashmiri, Sindhi, Sanskrit, Nepali, Bodo, Maithili, Santhali, Dogri, and Urdu — typically hosted on respective state SIC portals or DoPT.