When using the Kagi translate widget, and the left side is set to “detect language”, if you click the switcheroo arrow icon to swap the two sides, the translations get swapped, but not the languages.
Before:
After:
I would expect that the languages would also get swapped. The detected language (English, in the above screenshots) would end up on the right and the other language (Spanish in the above screenshots) would end up on the left.
Not sure whether it would be preferable to keep the left side in detect mode, or have it just take on the right side’s language permanently (i.e., not detect).