If your EWS certificate is in Hindi but your IIT admission requires an English version, you'll need an official translation. Get it done by a lawyer, notary public, or a 1st Class Gazetted Officer, ensuring they attest that the translation is accurate. This translated copy, along with the original Hindi certificate, should then be submitted to the IIT. While Hindi is an official language, fulfilling the institution's current requirement is advised to avoid admission delays.