A little Kagi nitpick (off-topic): I contributed a few translations when Kagi was in beta. Then, Kagi introduced a subscription which was too pricey for my budget, so I stopped using it. Nevertheless, Kagi has kept emailing me to contribute even more free translations.
Kagi team, folks say you have a great product, but if you don't pay attention to small issues like this one, you are bound to lose some of your goodwill.
We are definetely not emailing you, it could be the service we use to crowdsource translations (localazy). I suggest removing the account from there or check their settings? (as we do not have control over these emails)
Anyway, yes, they come from a service you are using with the subject line "[Kagi Search] There Are Some Untranslated Phrases." I know how to unsubscribe or reroute emails to my spam folder.
Kagi team, folks say you have a great product, but if you don't pay attention to small issues like this one, you are bound to lose some of your goodwill.