Tostarpadius and Paracel63 at svwiki report that the order in which interwiki links appear has recently changed (https://sv.wikipedia.org/wiki/Wikipedia:Bybrunnen#Interwikin_igen) and I can confirm what they say.
It's not on all articles, and a purge fixes the order. For example, the order in https://sv.wikipedia.org/wiki/Benfiskar was previously what Paracel63 posted (https://sv.wikipedia.org/w/index.php?diff=39370148), starting with 中文, Polski and Euskara. After my purge, the order is correct, starting with Afrikaans, Alemannisch and so on.