Yes, I did think you might have a bit of a difficulty with the language of that website but you came out on top.
I think I messed up because of the duality of the tag where I, without thinking much, thought the Mifare was writable - and therefor also the LF.
I really liked the tag since it is so small (flat - 1.5mm (0.05 inches)) but I guess I’ll need to look for something else.
Thank you for the information, despite the site/tag info-language.