"Circle owned by" is hard-coded in the source code (so there is no l10n translation), while sharing a folder or a file with a circle

[Jerome-Herbinet]

Because of this, the text is in English, regardless of the language of the Nextcloud web interface.

Here is the location of the sentence in my french interface (context) :

See the following line :
$display .= ' (Circle owned by ' . $circle->getOwner()->getDisplayName() . ')';

You can find it in circles/lib/Model/ShareWrapper.php:680:

Nextcloud 24.0.2
Contacts : 4.1.1
Circles : 24.0.0

Cc : @ArtificialOwl