There are roughly 400.000 Frisian speakers left. It is mostly spoken among friends and family. The spoken Frisian is unfortunately getting mixed up with Dutch. Because Dutch is the ruling language and a ruling language pushes smaller languages aside. But still, while the Dutch language is getting more fancy and starting to use more English words. The Frisian language is still holding up, already for centuries.
There are different kinds of Frisian dialects (yes also Frisian). Seven dialects and you’ll even see small differences between the little towns. The two biggest dialects are “it Klaaifrysk” and “it Wâldfrysk”. So far we only talked about Frisian in the Netherlands. But you have Frisian in Germany and Denmark as well. In Northern Germany, the islands bordered with Denmark(North-Friesland), there are less than 10.000 speakers left. The Frisian spoken over there is different from the Frisian you are learning on this website. The Frisian in North-Friesland is practically dead. Then we have East-Friesland left in Germany. It’s a whole region, but the only Frisian spoken is in Saterland, little region of 4 towns beneath East-Friesland. The Frisian language over here is heavily influenced by German, just like the North-Frisian by Danish/German. In Saterland there are only around a 1.000 speakers left… In case you got excited for East-Frisian or Söl’ring (North-Frisian dialect) you should check out one of these dictionaries: (both in German)
Online East-Frisian Dictionary
Online Söl’ring Dictionary