I agree about accent, but I want to encourage the parent post by saying that since his written English is excellent, he may be able to avoid that discrimination by sticking to text communication until he's established a relationship with someone at the interviewing company. This is what I try to do - I'm hard of hearing, and someone who doesn't understand the implications of that can easily jump to the conclusion that I'm an idiot or dishonest if I hesitate in answering a question. It just takes longer to process speech when someone changes topics quickly.