Exactly. Also Frisian is on that application, and its approximity to Dutch is 22,0.
PS. I have used this application for fun. Some of its comparisons are questionable, but it is nevertheless good in differentiating closely and more distantly related languages from randomly chosen language pairs.
The value of the index for Frisian is 22,0, so it could, but it's only a regional language (in its official status). However, I could have had it as text, like for Flemish, Yiddish and Faroese. I'll see. Thanks for the remark!
PS. I have used this application for fun. Some of its comparisons are questionable, but it is nevertheless good in differentiating closely and more distantly related languages from randomly chosen language pairs.