The pdf link says you can take one with you and there is no mention of a family member not able to do thatThanks ! I appreciate it but I did see this. But it has nothing as interpreter. Aniways @ankz001 has confirmed he went with his mom as interpreter for the US visa interview. Which embassy did you go btw ?
http://www.uwindsor.ca/international-student-centre/sites/uwindsor.ca.international-student-centre/files/dos_and_donts.pdf