I manually set the UI language to traditional Chinese on my iOS Kagi News app and the words on the UI changed to traditional Chinese as expected. However, after I swiped out the app from the “recent apps” and started the Kagi News app again, the interface language turned to simplified Chinese automatically.
Reproduction rate: every time.
App version: 1.0.2
iOS version: 26.0
Model: iPhone 15 Pro
The chosen interface language should be kept after restarting the app.