The Swedish term "föränderlig, ombytlig" matches the English term "changeable"

other swedish words that include "föränderlig" : english :
oföränderlig, alltid invariable
föränderlighet mutability
oföränderlig unchangeable
other swedish words that include "ombytlig" : english :
krabb sjö, ombytlig vind choppy
ombytlig, variabel variable