This actually is a real problem. Searching for "C#", "F#" or ".NET" breaks a lot of search engines and you get nothing useful. If I had to name something now I would go for a relatively unique name like "Clojure", "TypeScript" or "Haskell".
I am not the other person, but when I try to find a JSON decoding module for F* with "f* json", I get almost completely unrelated results. So, either there is no JSON codec for F* (I guess they could use the F#'s one) or Google can't find it.