Private category descriptions remain in English despite translation

Hey there, I’m not able to reproduce the issue even on meta’s staff categories nor on the theme component itself.

I think there might be some other issue happening.

Can you check with this data explorer query?

  SELECT
    c.locale AS cat_locale,
    cl.locale AS loc_locale,
    c.name AS cat_name,
    cl.name AS loc_name,
    c.description AS cat_description,
    cl.description AS loc_description
  FROM categories c
  LEFT JOIN category_localizations cl
    ON cl.category_id = c.id
  WHERE c.read_restricted = TRUE
  ORDER BY c.id, cl.locale

Another thing, are you on latest core and latest theme component versions?