In KWGT, Swedish language translation is incorrect. All of the settings remain in English but the days of the week change to Swahili, definitely not Swedish.
Damn language codes, i put "sw" instead of "sv", its fixed in next release (3.26), thanks for reporting.
P.S. Swedish translation is currently 65% complete if you want to contribute you can do here: https://www.getlocalization.com/kustom/