I don't think so shivani, because we all are fluent in our native language and more than that you can be able to at least manage English, In interviews they want the answers and your confidence rather than language. They always check with the knowledge and confidence. In my personal experience i went for both Tamil and Sinhalese people as my interviewer. In both situation i felt the language isn't a barrier for me. If you have confidence you can be answer whatever way the interviewer can understandable.