1. Everytime I knocked into her/HIS post/s, I have the same doubt. The only thing stopped me from pointing out this could-be dobule-flagger is her/HIS poor grammar which doesn't look from an Indian.
2. the best way to test is to write Chinese characters yourself with a very bad but recognisable handwriting on a piece of paper before uploading the pic here, so that google or any other online software will be doomed to fail, 100%.
3. if he is a double-flagger, then he must be either an Indian or even a Philippino (with deliberately "bad" grammar), or a Viet (with a naturally bad grammar
)