Way too few activities for Swedish learners
Why are there only additional activities for French, Spanish, and German? They have stories in Spanish. They have the little "chat practice" things for German and French, but nothing for those learning Swedish.
German, French, and Spanish were the first courses written, and not by volunteers but by Duo staff. When volunteer-written courses became the thing, many of the "extras" were scrapped.
It only stands to reason to add stories initially to the most-studied language here, rather than one that is not even in the top ten. The feature will be tested by many more people in any given amount of time, for Spanish.
As long as there is a framework that can be handled by volunteers (which stories currently does not have since it's only in labs, but hopefully it'll get there) then there's no reason to start with the languages with the most users, but instead the languages with the most active volunteers.