A way to determine which fallback font to use

I am fetching the list of all the fonts containing the meta-data but I notice that it doesn't contain which fallback values one should use for each font... Is there any way to make a good guess of what fallback font should be used? For example for `Akronim` the fallback in the googlefont page is `cursive` but in the API that fetches all the fonts, there is no mention of `cursive` in the `Akronim` entry... currently I just use the category as the fallback which in this case will be `display` but i would like to use the fallbacks that google font itself uses for each of its font. Is there any way to determine that?