I love how close to German Swedish is (förklarar≈erklärt)
Basically all verbs that start with för- are actually German loanwords, borrowed during the middle ages due to the immense influence of German traders dominating the economy in northern Europe.
Nice to know!
It's also similar to the Dutch 'verklaren'.
Looks and sounds like folklore, which is how i remembered it from a book i read a whike back.
Folklore often explained things that were beyond the comprehension of the time.