Thank you for the quick fix! I’ve verified on version 5.2.1 and can confirm that translations are now loading correctly on the admin settings page — see the attached screenshot.
One minor note: there are a few strings in the UI that appear to be hardcoded in English rather than wrapped in translation functions (e.g., __() or _e()), so those remain untranslated. Not a blocker at all, but worth noting for a future pass if you’re interested.
Thanks again for the fast turnaround — really appreciated!