No, the evaluation standard is the same for the IAS examination irrespective of the language or medium. As per the rules set by UPSC, a paper can be written in English or any Indian regional language recognized by the board. In that case, the medium or language in which the exam has been written does not affect the evaluation standards. Candidates are allowed to choose different languages to make them feel comfortable and confident while answering the UPSC CSE examination. And, it is not mandatory to appear for the IAS examination in any specific language or medium.