I had a student once who is British but worked for a Spanish university. He was (is) a very good writer, very clear, good structure etc. He had a paper reviewed

I had a student once who is British but worked for a Spanish university. He was (is) a very good writer, very clear, good structure etc. He had a paper reviewed once by someone who, probably because he saw the affiliation or the study area the paper was about (which was in Spain), assumed the author was Spanish, and put in his comments 'the author should consider having his writing reviewed by a native speaker to correct some of the obvious mistakes'. I LOL'ed that day.