I would love to have some Swedish language content on the Yoto. Even though most adults in Sweden speak English, kids don't start learning it until middle school so having Swedish language content for younger children could be a nice introduction to the Yoto, and many might like to have the option of both Swedish and English content as they get older. I think the Moomin books would be fantastic for this as they are also available in English (and potentially french and Spanish). They are classic books suitable for all ages and popular all over the world. I have suggested Kometen Kommer here as it is the first book in the series but I would also like to see the rest of the series in Swedish (and English):
Trollkarlens Hatt (Finn family moomintroll)
Farlig Midsommar (Midsummer madness)
Trollvinter (Moominland Midwinter)
Det osynliga barnet och andra berättelser (Tales from Moominvalley)
Pappan och havet (Moominpappa at sea)
Sent i November (Moominvalley in November)