The Swedish term "odygd, stygg, vanartig" matches the English term "naughty"

other swedish words that include "odygd" : english :
rackartyg, ofog, okynne, odygd mischief
odygd, okynnig mischievous
other swedish words that include "stygg" : english :
elak, skämd, ond, stygg, dålig, dålig bad
syndig, elak, ogudaktig, ond, stygg wicked
other swedish words that include "vanartig" : english :
lastbar, vanartig, ilsken vicious