questions for summer intern interview

hi, i applied to the summer intern program and i actually got a video interview and i've been doing some research into what they ask in the recorded interview and i have a general idea of them asking to introduce themselves, why mtr, and what they can contribute to the company. the only thing im unsure of is whether i can choose to answer in english or chinese. im from canada so although my chinese is good, i would say its not good in terms of corporate work, like i can def hold a normal conversation. if anyone has any idea or if any old intern can help me out, or if theres any other people that got an interview for this year, id love to hear from you. thanks!