Lille Prinsen, in Swedish.
I bought this book in Helsinki. Besides Finnish, Swedish is also an official language in Finland.
Lisslprinsn — in Elfdalian / Övdalian / Övdalsk / Övdalską / Älvdalska / Älvdalsmål, which is a North Germanic language spoken by up to 3,000 people living or having grown up in the locality of Älvdalen (Övdaln) located in the southeastern part of Älvdalen Municipality in northern Dalarna, Sweden.