I used to think Fjäll meant mountain, having seen the word on numerous signs and foods that had pictures of mountains, but Swedes alerted me to the fact that they are a particular type of mountains and the word is pronounced roughly like fell...and well, they are what Anglophiles who read too many dramatic British novels know as fells. Whatever the case, here in Scandinavia, fjälls are mountains that have snowy peaks, but they have also been eroded by glaciers, so their peaks are rather flat instead of rugged.
Regardless, here is Sweden you can get some damn good yogurt, made by Milko, that is called Fjäll, which is rich and creamy, but with a distinctive sort of fizz. According to my roommate, that fizz is produced from a reaction between the yogurt culture and the lining of the yogurt tetrapack (it's the box-thing that everything here is sold in), but I can't confirm this. Because the yogurt itself has a rich flavor, it has less sugar than most brands. The best flavor is hjorton, which means cloudberry, a rare berry that grows in the mountains here. I believe that Milko is trying to introduce fjäll into English-speaking countries, as they now have an English website.