That doesn't really surprise me at all. This happens even to funding organisations, although those positively judged grant applications that I know of were probably not computer generated, but carfully composed from wishful expectations

. Anyway, I remember that I also got one paper for review where I did not understand a word, because the method was a niche application. Usually, you should send this paper back to the journal so that they find a new reviewer. It gets problematic when you do some research and find that nobody else is working in that particular field. This brings the probablilty of a competent reviewer next to zero. This then poses the question: What do you do

?